https://www.jb51.net/article/126681.htm
https://cloud.tencent.com/developer/article/1354396
https://cuiqingcai.com/6080.html
https://docs.python.org/2/library/logging.html#logger-objects
https://www.cnblogs.com/CJOKER/p/8295272.html
https://www.cnblogs.com/liujiacai/p/7804848.html