Python日志logging

提示：扫一扫查出行
【扫一扫了解最新限行尾号】
复制提示

logging

用于便捷记录日志且 线程安全 的模块

1、单文件日志

import logging

logging.basicConfig(filename='log.log',

                    format='%(asctime)s - %(name)s - %(levelname)s -%(module)s:  %(message)s',

                    datefmt='%Y-%m-%d %H:%M:%S %p',

                    level=10)

logging.debug('debug')

logging.info('info')

logging.warning('warning')

logging.error('error')

logging.critical('critical')

logging.log(10,'log')

封装后：

import logging
import logging.handlers

class LogFactory(object):
    def __init__(self, filename):
        self.filename = filename
        self.log = logging.getLogger(self.filename)
        self.log.setLevel(logging.DEBUG)
        handler = logging.handlers.RotatingFileHandler(self.filename, maxBytes=100*1024*1024, backupCount=1000)
        formatter = logging.Formatter('%(asctime)s %(levelname)s: %(threadName)s [%(module)s.%(funcName)s, Line:%(lineno)d] %(message)s')
        handler.setFormatter(formatter)
        self.log.addHandler(handler)
        # self.log.error(msg)

    def msg(self, msg):
        self.log.info(msg)

if __name__ == '__main__':

    log = LogFactory("sm_article.log")

    try:
        log.msg("Begin to load articles and topics...")
        log.msg('HHHHHHHHHHH')

    except Exception as e:
        log.msg("Load catch error:%s" % e)

import logging

# create logger

logger = logging.getLogger("simple_example")

logger.setLevel(logging.DEBUG)

# create console handler and set level to debug

ch = logging.StreamHandler()

ch.setLevel(logging.DEBUG)

# create formatter

formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")

# add formatter to ch

ch.setFormatter(formatter)

# add ch to logger

logger.addHandler(ch)

# "application" code

logger.debug("debug message")

logger.info("info message")

logger.warn("warn message")

logger.error("error message")

logger.critical("critical message")

屏幕输出的错误信息

日志等级：

CRITICAL = 50

FATAL = CRITICAL

ERROR = 40

WARNING = 30

WARN = WARNING

INFO = 20

DEBUG = 10

NOTSET = 0

注：只有【当前写等级】大于【日志等级】时，日志文件才被记录。

日志记录格式：

2、多文件日志

对于上述记录日志的功能，只能将日志记录在单文件中，如果想要设置多个日志文件，logging.basicConfig将无法完成，需要自定义文件和日志操作对象。

# 定义文件

file_1_1 = logging.FileHandler('l1_1.log', 'a')

fmt = logging.Formatter(fmt="%(asctime)s - %(name)s - %(levelname)s -%(module)s:  %(message)s")

file_1_1.setFormatter(fmt)

file_1_2 = logging.FileHandler('l1_2.log', 'a')

fmt = logging.Formatter()

file_1_2.setFormatter(fmt)

# 定义日志

logger1 = logging.Logger('s1', level=logging.ERROR)

logger1.addHandler(file_1_1)

logger1.addHandler(file_1_2)

# 写日志

logger1.critical('')

日志一

# 定义文件

file_2_1 = logging.FileHandler('l2_1.log', 'a')

fmt = logging.Formatter()

file_2_1.setFormatter(fmt)

# 定义日志

logger2 = logging.Logger('s2', level=logging.INFO)

logger2.addHandler(file_2_1)

日志二

少了一句：

logger2.warning('warning')

如上述创建的两个日志对象

当使用【logger1】写日志时，会将相应的内容写入 l1_1.log 和 l1_2.log 文件中
当使用【logger2】写日志时，会将相应的内容写入 l2_1.log 文件中

根据时间进行日志切割

import logging

import os

import logging.handlers

class Logger(logging.Logger):

    """

    # my_log = Logger()

    #

    # # 输出日志

    # # log.info("日志模块消息!")

    # # log.debug("日志模块调试消息!")

    # my_log.error("日志模块错误消息!")

    """

    def __init__(self, filename=None):

        super(Logger, self).__init__(self)

        # 日志文件名

        if filename is None:

            filename = os.path.join(os.path.dirname(os.path.dirname(os.path.dirname(__file__))), "zk_css.log")

        self.filename = filename

        # 创建一个handler，用于写入日志文件 (每天生成1个，保留30天的日志)

        # fh = logging.handlers.TimedRotatingFileHandler(self.filename, 'D', , )

        fh = logging.handlers.WatchedFileHandler(self.filename)

        fh.suffix = "%Y%m%d-%H%M.log"

        fh.setLevel(logging.DEBUG)

        # 定义handler的输出格式

        formatter = logging.Formatter(

            '[%(asctime)s] - %(filename)s [Line:%(lineno)d] - [%(levelname)s]-[thread:%(thread)s]-[process:%(process)s] - [%(message)s]')

        fh.setFormatter(formatter)

        # 给logger添加handler

        self.addHandler(fh)

try:

    logpath = Config().get_content("log")["logpath"]

except Exception as e:

    logpath = ""

if os.path.exists(logpath):

    my_log = Logger(filename=logpath)

else:

    my_log = Logger()

my_log.error("adsfadf")

错误日志发邮件

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import logging, logging.handlers

class EncodingFormatter(logging.Formatter):
    def __init__(self, fmt, datefmt=None, encoding=None):
        logging.Formatter.__init__(self, fmt, datefmt)
        self.encoding = encoding

errlog = logging.getLogger()
sh = logging.handlers.SMTPHandler("mail host (smtp host)",
                                  '谁发的',
                                  '发给谁',
                                  "标题",
                                  credentials=('用户名', '密码'),
                                  secure=()
                                  )
errlog.addHandler(sh)
sh.setFormatter(EncodingFormatter('%(message)s', encoding='utf-8'))

errlog.error(u'你收到邮件了吗？')