update() takes at least 1 argument (0 given)

Raise code

        pass

    def update(*args, **kwds):
      if len(args) > 2:
        raise TypeError("update() takes at most 2 positional "
                        "arguments ({} given)".format(len(args)))
      elif not args:
        raise TypeError("update() takes at least 1 argument (0 given)")
      self = args[0]
      other = args[1] if len(args) >= 2 else ()

      if isinstance(other, Mapping):
        for key in other:
          self[key] = other[key]
      elif hasattr(other, "keys"):