成功解决A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,co

成功解决A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,co

 

 

目录

解决问题

解决思路

 

 

 

解决问题

 SettingWithCopyWarning:  A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,col_indexer] = value instead See the caveats in the documentation: http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy

 

 

解决思路

参考文章 http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy 当向列表中增加一列时，需要先将变量复制一份，再添加才可以

a=a.copy()
a['column01']= column