装饰器使用显示日志和测试函数性能

一.统计函数运行时间

import functools
import time


def wrap_performance(func):
    @functools.wraps(func)
    def wrapper(self, *args, **kwargs):
        t_begin = time.time()
        result = func(self, *args, **kwargs)
        t_end = time.time()
        print("Time: %f " % (t_end - t_begin))
        return result

    return wrapper


class Test:
    def __init__(self):
        pass

    @wrap_performance
    def test(self):
        time.sleep(1)


t = Test()
t.test()

二.插入日志

def wrap_logger(func):
    @functools.wraps(func)
    def wrapper(self, *args, **kwargs):
        print ("%s(%s, %s)" % (func, args, kwargs))
        print "before execute"
        result = func(self, *args, **kwargs)
        print "after execute"
        return result

    return wrapper


class Test:
    def __init__(self):
        pass

    @wrap_logger
    def test(self, a, b, c):
        print a, b, c


t = Test()
t.test(1, 2, 3)

来源：优快云
原文：https://blog.youkuaiyun.com/kongxx/article/details/51654751
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