@routing_params
    def _post_routing(self, attr, db_nums, args, kwargs, **fkwargs):
        if db_nums and self._down_connections in db_nums[0]:
            self.mark_connection_up(db_nums[0])

        return db_nums
dataset/ETHPy150Open disqus/nydus/nydus/db/routers/base.py/RoundRobinRouter._post_routing/swapped operands of `in`