python-logging備忘

python logging 備忘

經常使用format

log_formatter = logging.Formatter("%(asctime)s %(process)s %(thread)s %(filename)s [%(levelname)-5.5s] %(message)s")

經常使用handler

1. TimedRotatingFileHandler 按照日期切分日誌

   以下:

   from logging.handlers import TimedRotatingFileHandler
   file_handler = TimedRotatingFileHandler('%smain.log' % log_path, when='midnight')
   file_handler.suffix = '%Y_%m_%d.log'
   file_handler.setFormatter(log_formatter)

2. StreamHandler std輸出

   以下:

   std_handler = logging.StreamHandler(sys.stdout)
    std_handler.setFormatter(log_formatter)

添加handler

logger = logging.getLogger()
logger.addHandler(file_handler)
logger.addHandler(std_handler)
logger.setLevel(logging.WARNING)

終わり。