<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def argparser(self):
 """ For setting up the argparser for this instance. """


        if self.__argparser is None:
            self.__argparser = self.argparser_factory()
            self.init_argparser(self.__argparser)
        return self.__argparser