cachedict.py 文件源码

def pop(self, key, default=None):
        """ Get item from the dict and remove it.
        Return default if expired or does not exist. Never raise KeyError.
        """
        with self.lock:
            try:
                item = OrderedDict.__getitem__(self, key)
                del self[key]
                return item[0]
            except KeyError:
                return default