嵌套函数就是在一个函数里再嵌套一个或多个函数

# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR"def First():    print("in the first")    def Second():        print("in the second")        def Third():            print("in the third")        Third()    Second()First()

运行结果

如果要修改嵌套作用域中的变量，则需要nonlocal关键字

# -*- coding:utf-8 -*-__author__ = "MuT6 Sch01aR" def outer():    name = 'John'    def inner():        nonlocal name        name = 'Jack'        print(name)    inner()    print(name)outer()

运行结果