def _get_chat_tbl(self, cid):
        if self._chat_tbls not in cid:
            self._chat_tbls[cid] = self._db.reflect(cid)
        return self._chat_tbls[cid]
dataset/ETHPy150Open jaux/python-wechat/wechat/conversation.py/Conversation._get_chat_tbl/swapped operands of `not in`