简单装饰器
# simple decorator
def log1(func):
def wrapper(*args, **kwargs):
print("logging decorator is running, target is %s" % func.__name__)
func()
print("logging decorator is exiting, target is %s" %func.__name__)
return wrapper
@log1
def test():
print(time.ctime(time.time()))
if __name__ == "__main__":
test()
这里输出结果如下：
logging decorator is running, target is test
Mon Nov 12 22:48:46 2018
logging decorator is exiting, target is test
而这里的话，我们去理解到底发生了什么可以用代码去考量，我们使用了装饰器的语法糖，@log1实际上相当于
test = log1(test)
