python - 如何正确地将一列复制到另一列中（没有复制错误）？

Question

我想将一列复制到新列中。我使用这段代码：

df['income10']=df['income'].copy(deep=False)

我收到此错误：

/Users/hairy/ipykernel/ipykernel_launcher.py:2: 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

通过添加浅拷贝，我认为我可以防止错误。

标签： pythonpandas

Answer 1

尝试这样做：

df['income10']=df.loc[:, ['income']]