装饰器原理过程

#!/usr/bin/env python
# -*- coding:utf-8 -*-

def zhuangshiqi(func):
    def inner():
        print("hello")
        print("hello")
        r = func()
        print("end")
        print("end")
        print("end")
        return r
    return inner

@zhuangshiqi
"""
执行步骤
函数名一旦和@捆绑之后，执行zhuangshiqi函数，并将其下面的函数名当做参数
将zhuangshiqi的返回值重新赋值给f1
新的f1函数=inner
"""
def f1():
    print("f1")

def f2():
    print("f2")

f1()