python包xgboost安装和简单使用

先转载过来，我有时间再慢慢看

https://blog.csdn.net/rosefun96/article/details/78876569?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-0.no_search_link&spm=1001.2101.3001.4242.1