python 装饰器

很久没有怎么用装饰器了,重新温习了一下装饰器的使用,直接上代码:

 

#coding=utf-8



def logging(level):
def wrapper(func):
def inner_wrapper(*args, **kwargs):
print("[{level}]: enter function {func}()".format(
level=level,
func=func.__name__))
return func(*args, **kwargs)
return inner_wrapper
return wrapper

@logging(level='INFO')
def say(something):
print("say {}!".format(something))

# 如果没有使用@语法,等同于
# say = logging(level='INFO')(say)

@logging(level='DEBUG')
def do(something):
print("do {}...".format(something))

if __name__ == '__main__':
say('hello')
do("my work")

运行结果如下:

F:\dev\python\python.exe F:/pyCharm/pratice/decorate_demo/demo_3.py
[INFO]: enter function say()
say hello!
[DEBUG]: enter function do()
do my work...

Process finished with exit code 0

 

 

class logging(object):
def __init__(self, level='INFO'):
self.level = level

def __call__(self, func): # 接受函数
def wrapper(*args, **kwargs):
print("[{level}]: enter function {func}()".format(
level=self.level,
func=func.__name__))
func(*args, **kwargs)
return wrapper # 返回函数


@logging(level='INFO')
def say(something):
print("say {}!".format(something))


if __name__=="__main__":
say("abccc")

运行结果如下:

F:\dev\python\python.exe F:/pyCharm/pratice/decorate_demo/class_demo.py
[INFO]: enter function say()
say abccc!

Process finished with exit code 0

 

posted @ 2019-03-09 10:53  志不坚者智不达  阅读(179)  评论(0编辑  收藏  举报