import logging from logging import handlers class Logger(object):     level_relations = {
          'debug': logging.DEBUG,         'info': logging.INFO,         'warning': logging.WARN,         'error': logging.ERROR,         'crit': logging.CRITICAL     }     def __init__(self,filename,level='info',when='d',back_count=3,fmt='%(asctime)s - %(pathname)s[line:%(lineno)d] - %(levelname)s: %(message)s'):         self.logger = logging.getLogger(filename)         format_str = logging.Formatter(fmt) # 设置日志格式         self.logger.setLevel(self.level_relations.get(level)) # 设置日志级别，需要根据key去字典里取value         sh = logging.StreamHandler()         sh.setFormatter(format_str)         th = handlers.TimedRotatingFileHandler(filename=filename,                                                when=when,                                                backupCount=back_count,                                                encoding='utf-8'                                                )         th.setFormatter(format_str)         self.logger.addHandler(sh)         self.logger.addHandler(th) if __name__ == '__main__':     log = Logger('sherry.log')     log.logger.debug('立刻走= like you')     log.logger.info('info=infomation')     log.logger.warning('ssssss=warning')     log.logger.error('error')