odict.py 文件源码

def __reduce__(self):
            'Return state information for pickling'
            items = [[k, self[k]] for k in self]
            tmp = self.__map, self.__root
            del self.__map, self.__root
            inst_dict = vars(self).copy()
            self.__map, self.__root = tmp
            if inst_dict:
                return (self.__class__, (items,), inst_dict)
            return self.__class__, (items,)