装饰器学习

#!/usr/bin/env python
#-*- coding:utf-8 -*-
# author:leo
# datetime:2020/3/17 9:16
# software: PyCharm
#闭包
def outer():
    a=12
    def inner():
        print(a)
        return 1
    return inner
demo=outer()
print(demo())
# #装饰器
def auth(func):
    print('开始运行')
    def one():
        return func()
    return one
@auth
def test():
    return "nihao"
print(test()) #相当于 auth（test）（）
# #带参数装饰器
def auth1(func):
    print('开始运行')
    def one1(*args,**kwargs):
        print(args)
        print(kwargs)
        return func(*args,**kwargs)
    return one1
@auth1
def test1(a,b):
    return a+b
print(test1(a=4,b=9)) #相当于 auth1（test1）（a=4,b=9）
#装饰器带参数
def auth2(*args,**kwargs):
    print(args)
    def one2(func):
        def two2(*args,**kwargs):
            return func(*args,**kwargs)
        return two2
    return one2
@auth2(1,2)
def test2(a,b):
    return a+b
print(test2(1,9))#相当于 auth2(1,2)(test2)(a=4,b=9)