<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _run_argparser(self, argv):
 """Initialize a link with a set of arguments using an `argparser.ArgumentParser` """

        if self._parser is None:
            raise ValueError('Link was not given a parser on initialization')
        args = self._parser.parse_args(argv)
        self.update_args(args.__dict__)
        return args