code: def _get_defaults(func):
      
      try:
          code = func.__code__
      except AttributeError:
          # Some built-in functions don't have __code__, __defaults__, etc.
          return {}
      pos_count = code.co_argcount
      arg_names = code.co_varnames
      arg_names = arg_names[:pos_count]
      defaults = func.__defaults__ or ()
      kwdefaults = func.__kwdefaults__
      res = dict(kwdefaults) if kwdefaults else {}
      pos_offset = pos_count - len(defaults)
      for name, value in zip(arg_names[pos_offset:], defaults):
          assert name not in res
          res[name] = value
      return res
docs: Internal helper to extract the default arguments, by name.