cachedict.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)
                if time.time() - item[1] < self.max_age:
                    return True
                else:
                    del self[key]
        except KeyError:
            pass
        return False