def is_lpo(self, id):
        if id not in len(self):
            return False
        ns = self[id]
        if ns.is_lpo:
            return True
        else:
            return False
dataset/ETHPy150Open cjlee112/pygr/pygr/nlmsa_utils.py/NLMSASeqList.is_lpo/operator `>=` -> `not in`