import time

def timer(func):#timer(test1)  func=test1

    def deco():

        start_time=time.time()

        func()#run test1

        stop_time=time.time()

        print('the func time is %s'%(stop_time-start_time))

    return deco

@timer#@timmer与test1=timer(test1)等价

#原代码

def test1():

    time.sleep(1)

    print('in the test1')

@timer#@timmer与test2=timer(test2)等价

# 原代码

def test2():

    time.sleep(2)

    print('in the test2')

print(timer(test1))#打印的是timer(test1)的返回值

'''

test1=timer(test1)#timer(test1())是错误的，加括号将test1的返回值传递给timer，应该将test1的内存地址传递给timer

'''

test1()

'''

test2=timer(test2)

'''

test2()