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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _GetFieldAttributes(field):
 """Decomposes field into the needed arguments to pass to the constructor. This can be used to create copies of the field or to compare if two fields are "equal" (since __eq__ is not implemented on messages.Field). Args: field: A ProtoRPC message field (potentially to be copied). Raises: TypeError: If the field is not an instance of messages.Field. Returns: A pair of relevant arguments to be passed to the constructor for the field type. The first element is a list of positional arguments for the constructor and the second is a dictionary of keyword arguments. """

  if not isinstance(field, messages.Field):
    raise TypeError('Field %r to be copied not a ProtoRPC field.' % (field,))

  positional_args = []
  kwargs = {
      'required': field.required,
      'repeated': field.repeated,
      'variant': field.variant,
      'default': field._Field__default,  # pylint: disable=protected-access
  }

  if isinstance(field, messages.MessageField):
    # Message fields can't have a default
    kwargs.pop('default')
    if not isinstance(field, message_types.DateTimeField):
      positional_args.insert(0, field.message_type)
  elif isinstance(field, messages.EnumField):
    positional_args.insert(0, field.type)

  return positional_args, kwargs