<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def mock_attr(self, *args, **kwargs):
 """ Empty method to call to slurp up args and kwargs. `args` get pushed onto the url path. `kwargs` are converted to a query string and appended to the URL. """

        self.path.extend(args)
        self.qs.update(kwargs)
        return self