code: def is_module_stdlib(file_name):
      
      # TODO: Move these calls away from this function so it doesn't have to run
      # every time.
      lib_path = sysconfig.get_python_lib()
      path = os.path.split(lib_path)
      if path[1] == 'site-packages':
          lib_path = path[0]
      return file_name.lower().startswith(lib_path.lower())
docs: Returns True if the file_name is in the lib directory.