def get_offline_conductors(self):
        interval = CONF.conductor.heartbeat_timeout
        limit = timeutils.utcnow() - datetime.timedelta(seconds=interval)
        result = (model_query(models.Conductor).filter_by()
                  .filter(limit < models.Conductor.updated_at)
                  .all())
        return [row['hostname'] for row in result]
dataset/ETHPy150Open openstack/ironic/ironic/db/sqlalchemy/api.py/Connection.get_offline_conductors/swapped operands of `<`