python闭包

Posted 2020-10-22 liuw_flexi

参考来自：http://www.jb51.net/article/65478.htm

def createCounter():
    s = [0]
    def counter():
        s[0] = s[0] + 1
        print(s)
        return s[0]

    return counter

counterA = createCounter()

print(counterA(),counterA(),counterA(),counterA())


输出：
[1]
[2]
[3]
[4]
1 2 3 4

 当返回函数引用了循环变量或者后续会发生变化的变量时，这个变量会一直跟随该返回函数