code: def walk(top: Optional[os.PathLike], pathFilter=None):
      if top.is_file():
          if pathFilter is None or pathFilter(top):
              yield top
      elif top.is_dir():
          for root, _, files in os.walk(top):
              for name in files:
                  path = Path(top, root, name)
                  if pathFilter is None or pathFilter(path):
                      yield path
      else:
          yield top
  
imports: import argparse
  import datetime
  import logging
  import os
  import re
  import sys
  from pathlib import Path
  from typing import Optional
  import git
label_desc: Use image node_id 8 for calling a global function with example usage: walk(top, pathFilter) without return types