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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 organization(self, login):
 """Returns a Organization object for the login name :param str login: (required), login name of the org :returns: :class:`Organization <github3.orgs.Organization>` """

        url = self._build_url('orgs', login)
        json = self._json(self._get(url), 200)
        return Organization(json, self) if json else None