See the caveats in the documentation: https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy
fac_raw_data['产品分类_new'] = fac_raw_data['产品分类'].replace(map_dict)
报上述错误,fac_raw_data里原来没有'产品分类_new'这一列,我用'产品分类'去映射生成,这也会警告
fac_raw_data['xxxxxxxxxxxhhhh']=1,这样生成完全不存在的单列,也会警告
应该怎么改才不会警告呢