code: def pytest_cmdline_main(
      config: Config,
  ) -> Optional[Union[int, ExitCode]]:
      if config.option.version > 0:
          showversion(config)
          return 0
      elif config.option.help:
          config._do_configure()
          showhelp(config)
          config._ensure_unconfigure()
          return 0
      return None
  
imports: import os
  import sys
  from argparse import Action
  from typing import Generator
  from typing import List
  from typing import Optional
  from typing import Union
  import pytest
  from _pytest.config import Config
  from _pytest.config import ExitCode
  from _pytest.config import PrintHelp
  from _pytest.config.argparsing import Parser
  from _pytest.terminal import TerminalReporter
label_desc: Use image node_id 4 for calling a global function with example usage: pytest_cmdline_main(config) and returns: None, int, int