Extract .zip files in Inno Setup

You can use an external command line tool for unzipping your archive, see here for example. Put it in your [Files] section:

[Files]
Source: "7za.exe"; DestDir: "{tmp}"; Flags: deleteafterinstall;

Then call it in your [Run] section, like this:

[Run]
Filename: {tmp}\7za.exe; Parameters: "x ""{tmp}\example.zip"" -o""{app}\"" * -r -aoa"; Flags: runhidden runascurrentuser;

References
https://stackoverflow.com/questions/40704442/is-there-a-way-to-extract-zip-files-in-inno-setup-after-a-certain-page-is-done
https://stackoverflow.com/questions/6065364/how-to-get-inno-setup-to-unzip-a-file-it-installed-all-as-part-of-the-one-insta

Processing Incoming Request Data in Flask

from flask import request

Query Arguments

@app.route('/query-example')
def query_example():
    language = request.args.get('language') #if key doesn't exist, returns None

    return '''<h1>The language value is: {}</h1>'''.format(language)

Form Data

@app.route('/form-example', methods=['GET', 'POST']) #allow both GET and POST requests
def form_example():
    if request.method == 'POST':  #this block is only entered when the form is submitted
        language = request.form.get('language')
        framework = request.form['framework']

        return '''<h1>The language value is: {}</h1>
                  <h1>The framework value is: {}</h1>'''.format(language, framework)

    return '''<form method="POST">
                  Language: <input type="text" name="language"><br>
                  Framework: <input type="text" name="framework"><br>
                  <input type="submit" value="Submit"><br>
              </form>'''

JSON Data

@app.route('/json-example', methods=['POST']) #GET requests will be blocked
def json_example():
    req_data = request.get_json()

    language = req_data['language']
    framework = req_data['framework']
    python_version = req_data['version_info']['python'] #two keys are needed because of the nested object
    example = req_data['examples'][0] #an index is needed because of the array
    boolean_test = req_data['boolean_test']

    return '''
           The language value is: {}
           The framework value is: {}
           The Python version is: {}
           The item at index 0 in the example list is: {}
           The boolean value is: {}'''.format(language, framework, python_version, example, boolean_test)

References
https://www.digitalocean.com/community/tutorials/processing-incoming-request-data-in-flask

Return a JSON response using Flask in Python

from flask import Flask, jsonify

app = Flask(__name__)

@app.route('/api/get-json')
def hello():
    return jsonify(hello='world') # Returns HTTP Response with {"hello": "world"}
person = {'name': 'Alice', 'birth-year': 1986}
return jsonify(person)
@app.route("/")
def index():
    return flask.jsonify(response_value_1=1,response_value_2="value")

References
https://riptutorial.com/flask/example/5831/return-a-json-response-from-flask-api
https://www.kite.com/python/answers/how-to-return-a-json-response-using-flask-in-python

Make a PyQT window bring to the front

from win32gui import SetWindowPos
import win32con

SetWindowPos(window.winId(),
             win32con.HWND_TOPMOST, # = always on top. only reliable way to bring it to the front on windows
             0, 0, 0, 0,
             win32con.SWP_NOMOVE | win32con.SWP_NOSIZE | win32con.SWP_SHOWWINDOW)
SetWindowPos(window.winId(),
             win32con.HWND_NOTOPMOST, # disable the always on top, but leave window at its top position
             0, 0, 0, 0,
             win32con.SWP_NOMOVE | win32con.SWP_NOSIZE | win32con.SWP_SHOWWINDOW)
window.raise_()
window.show()
window.activateWindow()

References
https://stackoverflow.com/questions/12118939/how-to-make-a-pyqt4-window-jump-to-the-front

How to send emoji in Python telegram bot

client.send_message(chat, 'ūüėČ')
client.send_message(chat, '\U0001F609')

If you prefer to use text replacements in your code, install the emoji package:

import emoji
client.send_message(chat, emoji.emojize(':wink:'))

References
https://stackoverflow.com/questions/57549311/python-telegram-telethon-how-to-send-emoji
https://pypi.org/project/emoji/
https://apps.timwhitlock.info/emoji/tables/unicode
https://www.webfx.com/tools/emoji-cheat-sheet/

PyInstaller-built Windows EXE fails with multiprocessing

Enabling --onedir multiprocessing support on Windows (does NOT work with --onefile on Windows, but otherwise safe on all platforms/configurations):

if __name__ == '__main__':
    # On Windows calling this function is necessary.
    multiprocessing.freeze_support()

Enabling --onefile multiprocessing support on Windows (safe on all platforms/configurations, compatible with --onedir):

import multiprocessing.forking
import os
import sys

class _Popen(multiprocessing.forking.Popen):
    def __init__(self, *args, **kw):
        if hasattr(sys, 'frozen'):
            # We have to set original _MEIPASS2 value from sys._MEIPASS
            # to get --onefile mode working.
            os.putenv('_MEIPASS2', sys._MEIPASS)
        try:
            super(_Popen, self).__init__(*args, **kw)
        finally:
            if hasattr(sys, 'frozen'):
                # On some platforms (e.g. AIX) 'os.unsetenv()' is not
                # available. In those cases we cannot delete the variable
                # but only set it to the empty string. The bootloader
                # can handle this case.
                if hasattr(os, 'unsetenv'):
                    os.unsetenv('_MEIPASS2')
                else:
                    os.putenv('_MEIPASS2', '')

class Process(multiprocessing.Process):
    _Popen = _Popen

# ...

if __name__ == '__main__':
    # On Windows calling this function is necessary.
    multiprocessing.freeze_support()

    # Use your new Process class instead of multiprocessing.Process

References
https://stackoverflow.com/questions/24944558/pyinstaller-built-windows-exe-fails-with-multiprocessing

Hide the console while using os.system or subprocess.call in Python

si = subprocess.STARTUPINFO()
si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
#si.wShowWindow = subprocess.SW_HIDE # default
subprocess.call('taskkill /F /IM exename.exe', startupinfo=si)
CREATE_NO_WINDOW = 0x08000000
subprocess.call('taskkill /F /IM exename.exe', creationflags=CREATE_NO_WINDOW)
DETACHED_PROCESS = 0x00000008
subprocess.call('taskkill /F /IM exename.exe', creationflags=DETACHED_PROCESS)

References
https://stackoverflow.com/questions/7006238/how-do-i-hide-the-console-when-i-use-os-system-or-subprocess-call

Encoding of readAllStandardOutput() QProcess

    ...
    output = bytearray(self.process.readAllStandardOutput())
    output = output.decode(self.GetCMD_Encoding())
    print (output)

def GetCMD_Encoding(self):

    CMD = QProcess(self)
    CMD.setProcessChannelMode(QProcess.MergedChannels)
    CMD.start("C:\Windows\System32\chcp.com")
    CMD.waitForReadyRead()
    output = bytearray(CMD.readAllStandardOutput())
    output = output.decode("ascii")
    output = output[18:]
    return "cp" + output

References
https://stackoverflow.com/questions/41761132/pyqt-qprocess-readallstandardoutput-encoding
https://stackoverflow.com/questions/57663191/how-to-convert-a-qbytearray-to-a-python-string-in-pyside2