Python之logging日志模块

logging

用于便捷既然日志切线程安全的模块

vim log_test.py

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=logging.DEBUG)
 
logging.debug('debug')
logging.info('info')
logging.warning('warning')
logging.error('error')
logging.critical('critical')
logging.log(10,'log')

运行生成日志文件log.log

模拟一个生成错误日志的脚本

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=logging.DEBUG)
 
while True:
    option = raw_input("input a digit:")
    if option.isdigit():
        print "hehe",option
        logging.info('option correct')
    else:
        logging.error('Must input a digit!')

执行如果输入的是数字，写入info日志如果不是则写成error日志

PS：level=logging.DEBUG 是代表最低记录基本如果改成WARNING则不会记录info，debug信息就算设置了

上面是把日志写到文件里面

把日志显示到屏幕上面有输出到文件

import logging
 
logger = logging.getLogger("simple_example")
logger.setLevel(logging.DEBUG)
#on screen
ch = logging.StreamHandler()
ch.setLevel(logging.WARNING)
#into file
fh = logging.FileHandler("log2.log")
fh.setLevel(logging.DEBUG)
 
formatter = logging.Formatter("%(asctime)s - %(name)s - %(levelname)s -%(module)s:  %(message)s")
 
ch.setFormatter(formatter)
fh.setFormatter(formatter)
 
logger.addHandler(ch)
logger.addHandler(fh)
 
logger.debug("debug msg...")
logger.info("info msg...")
logger.warn("warn msg...")
logger.error("error msg...")
logger.critical("critical msg...")