1.# 帶參數的裝飾器
def f1(flag):
    def f2(func):
        def inner(*args,**kwargs):
            if flag:
                ‘‘‘執行函數之前要做的‘‘‘
            r=func(*args,**kwargs)
            if flag:
                 ‘‘‘執行函數之後要做的‘‘‘
            return r
        return inner
    return f2
@f1(True)
def f3():
    print(‘egon‘)
    return (‘eva‘)
s=f3()
print(s)


2.#多個裝飾器裝飾一個函數

def qqxing(func):
    def qqxing_inner(*args,**kwargs):
        print(‘in qqxing:before‘)
        ret = func(*args,**kwargs)
        print(‘in qqxing:after‘)
        return ret
    return qqxing_inner

def pipixia(func):
    def pipixia_inner(*args,**kwargs):
        print(‘in pipixia:before‘)
        ret = func(*args,**kwargs)
        print(‘in pipixia:after‘)
        return ret
    return pipixia_inner


@qqxing
@pipixia   
def dapangxie():
    print("餓了麽")
dapangxie()



#應用場景

#func
#1.計算func的執行時間 @timmer
#1.登錄認證 [email protected]