参考教程

https://www.jianshu.com/p/feb86c06c4f4

myapp.py 模块

import logging
import mylib
def main():
    logging.basicConfig(filename='myapp.log',level=logging.DEBUG)
    logging.info('Started')
    mylib.do_something()
    logging.info('Finished')

if __name__ == '__main__':
    main()

mylib.py 模块

import logging

def do_something():
    logging.info('Doing something')

执行 myapp.py 模块会打印相应日志，在文件 myapp.log 中显示信息如下：

INFO:root:Started INFO:root:Doing something INFO:root:Finishe