def clients(self, client_type, version=None, admin=False):
        """Get a mocked client."""
        key = (client_type, version, admin)
        if self._clients not in key:
            self._clients[key] = self.client_factory(client_type,
                                                     version=version,
                                                     admin=admin)
        return self._clients[key]
dataset/ETHPy150Open openstack/rally/tests/unit/test.py/ScenarioTestCase.clients/swapped operands of `not in`