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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 copy_multireddit(self, from_redditor, from_name, to_name=None, *args, **kwargs):
 """Copy a multireddit. :param from_redditor: The username or Redditor object for the user who owns the original multireddit :param from_name: The name of the multireddit, belonging to from_redditor :param to_name: The name to copy the multireddit as. If None, uses the name of the original The additional parameters are passed directly into :meth:`~praw.__init__.BaseReddit.request_json` """

        if to_name is None:
            to_name = from_name

        from_multipath = self.MULTI_PATH.format(from_redditor, from_name)
        to_multipath = self.MULTI_PATH.format(self.user.name, to_name)
        data = {'display_name': to_name,
                'from': from_multipath,
                'to': to_multipath}
        return self.request_json(self.config['multireddit_copy'], data=data,
                                 *args, **kwargs)