python log配置，实用性

import logging
from logging import root
from logging.handlers import RotatingFileHandler

root.setLevel(level = logging.ERROR)
handler = RotatingFileHandler(filename='operation_log.log', mode='a', maxBytes=10*1024*1024,backupCount=2)
formatter = logging.Formatter('%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s')
handler.setFormatter(formatter)
console = logging.StreamHandler()
console.setFormatter(formatter)
root.addHandler(handler)
root.addHandler(console)
logger=logging.getLogger()
logger.setLevel(logging.INFO)

#放在文件前面，需要写日志的时候就
logger.info(“你想说的信息”)