[py]python logging模块

默认级别是warning,输出到console

import logginglogging.info(1213231)logging.warning(1213231)

调整级别为info,输出到console

import logginglogging.basicConfig(level=logging.DEBUG)logging.info(1213231)logging.warning(1213231)

日志内容输出到文件

import logginglogging.basicConfig(filename="test.log", level=logging.DEBUG)logging.info(1213231)logging.warning(1213231)

日志基本操作

import logging# 文件 格式f1 = logging.FileHandler("f1.log", 'a', encoding='utf-8')f1.setFormatter(fmt="")# 级别logger1 = logging.Logger("s1", level=logging.INFO)logger1.addHandler(f1)logger1.debug("hello world")

日志基本操作–带格式

import loggingf2 = logging.FileHandler("f2.txt", 'a', encoding='utf8')fmt = logging.Formatter("%(name)s - %(asctime)s - %(message)s")f2.setFormatter(fmt)logger2 = logging.Logger("s1", level=logging.INFO)logger2.addHandler(f2)# logger1.debug("hi1")logger2.info("hi2")

输出到屏幕和文件

#!/usr/bin/env python# encoding: utf-8import logging# 定义handler的输出格式formatter = logging.Formatter(    '%(asctime)s--%(name)s--%(filename)s--%(message)s')# 创建一个handler,用于写入日志文件,只输出debug级别以上的日志fh = logging.FileHandler('f3.log')fh.setFormatter(formatter)# 再创建一个handler,用于输出到控制台ch = logging.StreamHandler()ch.setFormatter(formatter)# 创建一个logging命名为mylogger,%(name)s日志格式里可调用这个名字# logger = logging.Logger("mylogger", level=logging.DEBUG)logger = logging.getLogger('mylogger')logger.setLevel(logging.DEBUG)# 给logger添加handlerlogger.addHandler(fh)logger.addHandler(ch)# 记录两条日志logger.info('foorbar')logger.debug('just a test')

封装成函数

import loggingdef InitLogger(filename, level, name):    # create a logging object    logger = logging.getLogger(name)    logger.setLevel(level)    # format log file    formatter = logging.Formatter(        '%(asctime)s %(name)s-%(levelname)s-%(filename)s-[line:%(lineno)s]: %(message)s')    # create the logging file handler and format the log file    fh = logging.FileHandler(filename, mode='a+')    fh.setFormatter(formatter)    # create logging print Stream    ch = logging.StreamHandler()    ch.setFormatter(formatter)    # logger object load the hander    logger.addHandler(fh)    logger.addHandler(ch)    return loggerlogger = InitLogger("ma.log", "DEBUG", "maxiaolang")logger.info("hello info")

参考: http://aolens.blog.51cto.com/7021142/1902668