import time, functools

def metric(fn):

    @functools.wraps(fn)

    def wrapper(*args,**kw):

        a=time.time()

        res=fn(*args,**kw)

        b=time.time()

        print('%s executed in %s ms' % (fn.__name__, b-a))

        return fn(*args,**kw)

    return wrapper

@metric

def fast(x, y):

    time.sleep(0.0012)

    return x + y

@metric

def slow(x, y, z):

    time.sleep(0.1234)

    return x * y * z

f = fast(11, 22)

s = slow(11, 22, 33)

if f != 33:

    print('测试失败!')

elif s != 7986:

    print('测试失败!')