pandas 分层索引

https://github.com/wk2014/PandasLearnClass/blob/master/pandas%20%E5%88%86%E5%B1%82%E7%B4%A2%E5%BC%952.ipynb

https://github.com/wk2014/PandasLearnClass/blob/master/pandas%20%E5%88%86%E5%B1%82%E7%B4%A2%E5%BC%953%20%EF%BC%9A%E4%BD%BF%E7%94%A8DataFrame.set_index%20OR%20reset_index%20%E5%B0%86%E5%88%97%E8%BD%AC%E6%8D%A2%E4%B8%BA%EF%BC%88%E5%88%86%E5%B1%82%E7%B4%A2%E5%BC%95%EF%BC%89.ipynb

pandas 分层索引

原文：https://www.cnblogs.com/ziheIT/p/9061873.html