utils.py 文件源码

def lru_dict_arg_cache(func: Callable) -> Callable:
    # TODO? wrapper that allows maxsize
    def unpacking_func(func: Callable, arg: frozenset) -> Any:
        return func(dict(arg))

    _unpacking_func = _lru_cache_wrapper(partial(unpacking_func, func),  # type: ignore
                                         64, False, _CacheInfo)

    def packing_func(arg: Dict[Hashable, Hashable]) -> Any:
        return _unpacking_func(frozenset(arg.items()))

    update_wrapper(packing_func, func)
    packing_func.cache_info = _unpacking_func.cache_info  # type: ignore
    return packing_func