python之装饰器 实例
=====================================写法1==========================import time
def timer(func):
def deco():
start_time = time.time()
func()
stop_time = time.time()
print('the func run time is %s' %(stop_time - start_time
return deco
def test1():
print('this is test1')
def test2():
print('this is test2')
test1 = timer(test1)把deco内在地址赋值给test1
test1()#test1未被改变，而且调用方式也未被改变
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