【Python】logging结合decorator模式实优化日志输出

python内置的loging模块非常简便易用, 很适合程序运行日志的输出。

而结合python的装饰器模式，则可实现简明实用的代码。测试代码如下所示:

#! /usr/bin/env python2.7
# -*- encoding: utf-8 -*-

import logging

logging.basicConfig(format='[%(asctime)s] %(message)s', level=logging.INFO)


def time_recorder(func):
    """装饰器, 用在func方法执行前后, 增加运行信息"""
    def wrapper():
        logging.info("Begin to execute function: %s" % func.__name__)
        func()
        logging.info("Finish executing function: %s" % func.__name__)

    return wrapper


@time_recorder
def first_func():
    print "I'm first_function. I'm doing something..."


@time_recorder
def second_func():
    print "I'm second_function. I'm doing something..."


if __name__ == "__main__":
    first_func()
    second_func()

运行并得到输出:

[2014-04-01 18:02:13,724] Begin to execute function: first_func
I'm first_function. I'm doing something...
[2014-04-01 18:02:13,725] Finish executing function: first_func
[2014-04-01 18:02:13,725] Begin to execute function: second_func
I'm second_function. I'm doing something...
[2014-04-01 18:02:13,725] Finish executing function: second_func

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