3-13 装饰器

 

 

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import time
def fun(bian):   ###装饰器
    def fun_1():  ##定义
        start_time = time.time()
        bian()
        stop_time = time.time()
        print('it is run %s'%(stop_time-start_time))
    return fun_1
@fun      ##调用装饰器  也等于 aa = aa(fun)
def aa():
    time.sleep(3)
    print('it is in aa')

aa()

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