RotatingFileHandler

按文件大小拆分日志

参数说明

logging.handlers.``RotatingFileHandler(filename, mode=’a’, maxBytes=0, backupCount=0, encoding=None, delay=0)

maxBytes - 每个文件最大字节数，超出时自动添加后缀.1, .2, …
backupCount - 最大备份数

示例

import logging
from logging.handlers import RotatingFileHandler
logger = logging.getLogger('SQD')
logger.setLevel(logging.DEBUG)
formatter = logging.Formatter(
    fmt='[%(asctime)s %(levelname)s %(filename)s:%(lineno)d] %(message)s',
    datefmt='%Y%m%d %H:%M:%S')
file_hdlr = RotatingFileHandler('log/out.log',
                                mode='a',
                                maxBytes=500,
                                backupCount=3)
file_hdlr.setFormatter(formatter)
logger.addHandler(file_hdlr)
logger.debug('debug message')
logger.info('info message')
logger.warn('warn message')