python 中的nonlocal

在python中声明全局变量可以使用关键字global，那么如何声明方法级之间的变量就需要用到nonlocal

# coding=utf-8

def change():
    name = "wang"
    print(name)
    print(id(name))
    def lear():
        nonlocal name
        name ="nie"
        print(name)
        print(id(name))
    lear()
    print(name)
    print(id(name))
if __name__ == '__main__':
    change()