装饰器通用写法-JZTXT

'''
一、装饰器通用写法
def wrapper_out(params)
    print(params)
    def wrapper(func):
        def inner(*args,**kwargs):
            print('打开外挂')       #  执行前操作
            res = func(*args,**kwargs)
            print('关闭外挂')       #  执行后操作
            return res
        return inner
    return wrapper

二、装饰器嵌套
def wrapper1(func):
        def inner(*args,**kwargs):
            print('wrapper1打开外挂')       #  执行前操作   1
            res = func(*args,**kwargs)
            print('wrapper1关闭外挂')       #  执行后操作   5
            return res
        return inner

def wrapper2(func):
        def inner(*args,**kwargs):
            print('wrapper2打开外挂')       #  执行前操作   2
            res = func(*args,**kwargs)
            print('wrapper2关闭外挂')       #  执行后操作   4
            return res
        return inner

@wrapper1      # target = wrapper1(wrapper2.inner)
@wrapper2      # target = wrapper2(target)  ---> wrapper2.inner
def target():
      print('target')                                       3

执行顺序： 1,2,3,4,5
'''

def wrapper(game):
    def inner():
        print('打开外挂')
        game()
        print(wrapper.__name__)
        print('关闭外挂')
    return inner

@wrapper
def play_dnf():
    print('德玛西亚！！！')

play_dnf()