Python 모듈: 로깅

#logging初识
 
import logging
 
logging.warning("user [James] attempted wrong password more than 3 times")
logging.critical("server is down")
 
# WARNING:root:user [James] attempted wrong password more than 3 times
# CRITICAL:root:server is down

#日志打印到文件中
 
import  logging
 
logging.basicConfig(filename="example.log",level=logging.INFO,
                    format="%(asctime)s %(message)s", datefmt="%m/%d/%Y %H:%M:%S [%A]")
                                                                # H 24小时格式  I 12小时格式  A 周几完整  a 周几简写  p AM/PM
 
 
logging.debug("This message should go to the log file")
logging.info("So should this")
logging.warning("And this ,too")

10/31/2016 17:16:17 [Monday] So should this
10/31/2016 17:16:17 [Monday] And this ,too

#!/usr/bin/env python
# -*- coding:utf-8 -*-
#-Author-Lian
 
import  logging
 
#创建logger
logger = logging.getLogger("test_log")  #创建logger对象   括号内容随便写
logger.setLevel(logging.INFO)       #全局日志级别
 
 
ch = logging.StreamHandler()        #日志打印到屏幕上
ch.setLevel(logging.DEBUG)          #指定ch日志打印级别
 
fh = logging.FileHandler("access.log")      #日志存进文件
fh.setLevel(logging.WARNING)            #指定fh日志输入级别
 
formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s - %(message)s")   #定义日志格式，可写多个
 
#添加日志格式到ch,fh
ch.setFormatter(formatter)
fh.setFormatter(formatter)
 
#添加ch,fh到logger中
logger.addHandler(ch)
logger.addHandler(fh)
 
 
logger.debug('debug message')
logger.info('info message')
logger.warn('warn message')
logger.error('error message')
logger.critical('critical message')

2016-10-31 17:23:42,988 - test_log - INFO - info message
2016-10-31 17:23:42,988 - test_log - WARNING - warn message
2016-10-31 17:23:42,988 - test_log - ERROR - error message
2016-10-31 17:23:42,988 - test_log - CRITICAL - critical message

2016-10-31 17:02:06,223 - test_log - WARNING - warn message
2016-10-31 17:02:06,224 - test_log - ERROR - error message
2016-10-31 17:02:06,224 - test_log - CRITICAL - critical message