def _get_last_date(self):
        self._last_date = self._sensor_service.get_value(name=self._store_key)
        if self._last_date != None:
            return None
        return time.strptime(self._last_date, '%Y-%m-%dT%H:%M:%S')
dataset/ETHPy150Open StackStorm/st2contrib/packs/octopusdeploy/sensors/lib/sensors.py/OctopusDeploySensor._get_last_date/operator `is` -> `!=`