Python logging 示例

Python logging 示例

介绍

• 参考
• 相关 Handler
  • StreamHandler
  • FileHandler
  • NullHandler
  • WatchedFileHandler
  • BaseRotatingHandler
  • RotatingFileHandler
  • TimedRotatingFileHandler
  • SocketHandler
  • DatagramHandler
  • SysLogHandler
  • NTEventLogHandler
  • SMTPHandler
  • MemoryHandler
  • HTTPHandler
  • QueueHandler
  • QueueListener
• logging.error('xxx', exc_info=True, stack_info=True, extra={'user': 'Tom'})
  • exc_info=True 将异常信息添加到日志消息中
  • stack_info=True 将栈信息会被添加到日志信息中
  • extra 添加额外信息

示例

demo1

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

import logging
import sys

## start log
# create logger
log_level = logging.DEBUG
formatter = logging.Formatter(
    fmt="%(asctime)-15s %(levelname)s %(process)d %(filename)s %(lineno)d: %(message)s",
    datefmt="%a %d %b %Y %H:%M:%S")

logger = logging.getLogger(name="test")
logger.setLevel(log_level)

fh = logging.FileHandler(filename="test.log")
fh.setLevel(log_level)
fh.setFormatter(formatter)
logger.addHandler(fh)

oh = logging.StreamHandler(sys.stdout)
oh.setLevel(log_level)
oh.setFormatter(formatter)
logger.addHandler(oh)
## end log

logger.debug("debug")
logger.info("info")
logger.info("info")
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demo2

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

import logging
# import logging.handlers
from logging import handlers
import datetime

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

rfh = handlers.TimedRotatingFileHandler(
    'all.log', when='midnight', interval=1, backupCount=7, atTime=datetime.time(0, 0, 0, 0))
rfh.setFormatter(
    logging.Formatter("%(asctime)s - %(levelname)s - %(message)s"))

fh = logging.FileHandler('error.log')
fh.setLevel(logging.ERROR)
fh.setFormatter(
    logging.Formatter("%(asctime)s - %(levelname)s - %(filename)s[:%(lineno)d] - %(message)s"))

logger.addHandler(rfh)
logger.addHandler(fh)

logger.debug('debug message')
logger.info('info message')
logger.warning('warning message')
logger.error('error message')
logger.critical('critical message')
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demo3

根据日志级别写入不同的文件

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

import logging
# import logging.handlers
from logging import handlers
import datetime

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

rfh = handlers.TimedRotatingFileHandler(
    'all.log', when='midnight', interval=1, backupCount=7, atTime=datetime.time(0, 0, 0, 0))
rfh.setFormatter(
    logging.Formatter("%(asctime)s - %(levelname)s - %(message)s"))

fh = logging.FileHandler('error.log')
fh.setLevel(logging.ERROR)
fh.setFormatter(
    logging.Formatter("%(asctime)s - %(levelname)s - %(filename)s[:%(lineno)d] - %(message)s"))

logger.addHandler(rfh)
logger.addHandler(fh)

logger.debug('debug message')
logger.info('info message')
logger.warning('warning message')
logger.error('error message')
logger.critical('critical message')
source repo / download raw