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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 lounge_upgrade(self, email, password, release_id):
 """Download & install an upgrade from the CDRouter Support Lounge using your Support Lounge email & password. Please note that any running tests will be stopped. :param email: CDRouter Support Lounge email as a string. :param password: CDRouter Support Lounge password as a string. :param release_id: Release ID as an int. :return: :class:`system.Upgrade <system.Upgrade>` object :rtype: system.Upgrade """

        schema = UpgradeSchema()
        resp = self.service.post(self.base+'lounge/upgrade/',
                                 json={'email': email, 'password': password, 'release': {'id': int(release_id)}})
        return self.service.decode(schema, resp)