python logging bydate

 #!/usr/bin/env python
 #_*_coding:utf-8_*_
 # vim : set expandtab ts=4 sw=4 sts=4 tw=100 :

 import logging
 import time
 import re
 from logging.handlers import TimedRotatingFileHandler
 from logging.handlers import RotatingFileHandler

 def main():
     #日志打印格式
     log_fmt = '%(asctime)s\tFile \"%(filename)s\",line %(lineno)s\t%(levelname)s: %(message)s'
     formatter = logging.Formatter(log_fmt)
     #创建TimedRotatingFileHandler对象
     log_file_handler = TimedRotatingFileHandler(filename="ds_update", when="M", interval=2, backupCount=2)
     #log_file_handler.suffix = "%Y-%m-%d_%H-%M.log"
     #log_file_handler.extMatch = re.compile(r"^\d{4}-\d{2}-\d{2}_\d{2}-\d{2}.log$")
     log_file_handler.setFormatter(formatter)
     logging.basicConfig(level=logging.INFO)
     log = logging.getLogger()
     log.addHandler(log_file_handler)
     #循环打印日志
     log_content = "test log"
     count = 0
     while count < 30:
         log.error(log_content)
         time.sleep(20)
         count = count + 1
     log.removeHandler(log_file_handler)

 if __name__ == "__main__":
     main()