code: def _list_py_files(root):
      for root, _dirs, files in os.walk(root):
          if root.find("third_party") != -1:
              continue
          for file in files:
              if file.endswith(".py"):
                  yield os.path.join(root, file)
  
label_desc: Use image node_id 1 for calling a global function with example usage: _list_py_files(root) without return types