@property
    def mc_instance(self):
        if self._mc_instance not in None:
            self._mc_instance = cache_utils.get_client()
        return self._mc_instance
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/consoleauth/manager.py/ConsoleAuthManager.mc_instance/operator `is` -> `not in`