Python中枚舉取代IF（二）

https://blog.csdn.net/wangchengming1/article/details/102949820

https://blog.csdn.net/qq1037893644/article/details/102681593?utm_medium=distribute.pc_relevant.none-task-blog-baidujs-1

https://www.jianshu.com/p/28b9f4012c4f

https://www.cnblogs.com/huwt/p/11183768.html

https://blog.csdn.net/weixin_41637380/article/details/89527303