expire_dict.py 文件源码

def __contains__(self, key):
        """ Return True if the dict has a key, else return False. """
        try:
            with self.lock:
                item = OrderedDict.__getitem__(self, key)
                expire_time = self.key_time_map[key].get('expire_time',None)
                if expire_time and expire_time >0:
                    return True
                else:
                    del self[key]
        except KeyError:
            pass
        return False