code: def useQt(qtLib: str = "PyQt5", period: float = 0.01):
      """
      Run combined Qt5/asyncio event loop.
  
      Args:
          qtLib: Name of Qt library to use:
  
            * PyQt5
            * PyQt6
            * PySide2
            * PySide6
          period: Period in seconds to poll Qt.
      """
  
      def qt_step():
          loop.call_later(period, qt_step)
          if not stack:
              qloop = qc.QEventLoop()
              timer = qc.QTimer()
              timer.timeout.connect(qloop.quit)
              stack.append((qloop, timer))
          qloop, timer = stack.pop()
          timer.start(0)
          qloop.exec() if qtLib == "PyQt6" else qloop.exec_()
          timer.stop()
          stack.append((qloop, timer))
          qApp.processEvents()  # type: ignore
  
      if qtLib not in ("PyQt5", "PyQt6", "PySide2", "PySide6"):
          raise RuntimeError(f"Unknown Qt library: {qtLib}")
      from importlib import import_module
  
      qc = import_module(qtLib + ".QtCore")
      qw = import_module(qtLib + ".QtWidgets")
      global qApp
      qApp = (
          qw.QApplication.instance()  # type: ignore
          or qw.QApplication(sys.argv)
      )  # type: ignore
      loop = getLoop()
      stack: list = []
      qt_step()
  
imports: import asyncio
  import datetime
  import logging
  import math
  import signal
  import sys
  import time
  from dataclasses import fields, is_dataclass
  from typing import AsyncIterator, Awaitable, Callable, Iterator, List, Optional, Union
  import eventkit
label_desc: Use image node_id 24 for calling a global function with example usage: useQt(qtLib, period) without return types