python 日志

新建test.py

import logging

logger = logging.getLogger(__name__)
logger.setLevel(level = logging.INFO)
handler = logging.FileHandler("runtest.log")
handler.setLevel(logging.INFO)
formatter = logging.Formatter('%(levelname)s-%(asctime)s -> %(message)s')#
handler.setFormatter(formatter)
logger.addHandler(handler)
logger.info("begin run !")

运行

python test.py

然后查看当前目录的runtest.log，会看到下面的结果

INFO-2018-11-19 18:16:47,031 -> begin run !