你能解释闭包（因为它们与Python有关）？ [英] Can you explain closures (as they relate to Python)?

问题描述

我已经阅读了很多关于闭包，我认为我理解他们，但没有为自己和其他人遮掩的图片，我希望有人可以解释闭包，尽可能简洁和清晰。我正在寻找一个简单的解释，可能会帮助我了解在哪里和为什么要使用它们。

I've been reading a lot about closures and I think I understand them, but without clouding the picture for myself and others, I am hoping someone can explain closures as succinctly and clearly as possible. I'm looking for a simple explanation that might help me understand where and why I would want to use them.

推荐答案

关闭关闭

对象是方法
附加的数据，闭包是附加了
数据的函数。

Objects are data with methods attached, closures are functions with data attached.

def make_counter():
    i = 0
    def counter(): # counter() is a closure
        nonlocal i
        i += 1
        return i
    return counter

c1 = make_counter()
c2 = make_counter()

print (c1(), c1(), c2(), c2())
# -> 1 2 1 2

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