装饰器范例

import time
def timer(func):
    def deco(*args,**kwargs):
        start_time=time.time()
        func(*args,**kwargs) #运行test1
        stop_time=time.time()
        print('func running time： %s'%(stop_time-start_time))
    return deco
@timer #开始运行test1=timer(test1)
def test1():
    time.sleep(3)
    print('in the test1')
test1()