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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 membership_in(self, organization):
 """Retrieve the user's membership in the specified organization."""

        url = self._build_url('user', 'memberships', 'orgs',
                              str(organization))
        json = self._json(self._get(url), 200)
        return Membership(json, self)