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练习

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def metric(fn):

    def warraps(*args, **kw):

        startTime= time.time()

        print("begin call%s():" %(fn.__name__))

        resurt = fn(*args, **kw)

        print("end call%s():" %(fn.__name__))

        endTime = time.time()

        print("运行时间: %s"%(endTime - startTime))

        return  resurt

    return warraps


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