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

Process finished with exit code 0