Python在标准库中是否有装饰器？ [英] Does Python have decorators in the standard library?

问题描述

除了 @staticmethod 和 @classmethod 之外？大多数语言都有一些利用大多数语言功能的基本库。

Apart from @staticmethod and @classmethod? Most languages have some basic libraries making use of most of the language features.

似乎我发现自己制作的许多装饰器都是很多人会使用的东西，但是我还没有找到任何内置的python装饰器来做到这一点。有这样的东西吗？

It seems that many of the decorators I find myself making are things which tons of people would use, but I haven't found any inbuilt python decorators which do them. Are there such things?

推荐答案

属性通常用作装饰器。

functools 具有通常用作修饰符的几种功能，例如 total_ordering ， update_wrapped ， lru_cache 和包裹。

functools has several functions normally used as a decorator, such as total_ordering, update_wrapped, lru_cache, and wraps.

contextlib具有 contextmanager 装饰器。

contextlib has the contextmanager decorator.

请记住，您可以使用任何功能作为装饰器：

Keep in mind, you can use any function as a decorator:

@decorator
def function(): pass

与

def function(): pass
function = decorator(function)

为了有用，通常需要以可调用对象作为参数，并且需要返回可调用对象。 （属性是第二部分的例外。）

In order to be useful, they generally need to be expecting a callable as an argument and they need to return a callable object. (property is an exception to the second part of that.)

也可以修饰类，

还有一个装饰列表。在Python Wiki上。其中有些在标准库中，有些不在标准库中。

There is also a list of decorators on the Python Wiki. Some of them are in the standard library, some are not.

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