python脚本写log日志文件

一、定义Logger类

import logging
from logging import handlers

class Logger(object):
    level_relations = {
        'debug':logging.DEBUG,
        'info':logging.INFO,
        'warning':logging.WARNING,
        'error':logging.ERROR,
        'crit':logging.CRITICAL
    }

    def __init__(self,filename,printflag=False,level='info',when='D',backCount=3,fmt='%(asctime)s - %(pathname)s[line:%(lineno)d] - %(levelname)s: %(message)s'):
        self.logger = logging.getLogger(filename)
        format_str = logging.Formatter(fmt)
        self.logger.setLevel(self.level_relations.get(level))
        if printflag:
            sh = logging.StreamHandler()
            sh.setFormatter(format_str)
            self.logger.addHandler(sh)
        th = handlers.TimedRotatingFileHandler(filename=filename,when=when,backupCount=backCount,encoding='utf-8')#往文件里写入#指定间隔时间自动生成文件的处理器
        th.setFormatter(format_str)
        self.logger.addHandler(th)

二、实例化、调用

import time
logpath = './log.txt'
log = Logger(logpath, level='info')
log.logger.info('==={}===\n'.format(time.strftime("%Y-%m-%d %H:%M:%S", time.localtime())))