ENH: To add an `inplace` option for pd.DataFrame.reindex

[blue-cat-whale]

Feature Type

• Adding new functionality to pandas

• Changing existing functionality in pandas

• Removing existing functionality in pandas

Problem Description

I wish I could update the index of a dataframe inplace.

Feature Description

Functions pd.DataFrame.set_index() and pd.DataFrame.reset_index() both have an option of inplace=True. I hope function pd.DataFrame.reindex() add it as well. This might lead to adding another option of drop=True.

Alternative Solutions

N/A

Additional Context

No response

[jorisvandenbossche]

Given that we are planning to remove the inplace keyword in most cases (see #51466, rendered view of the PDEP at https://jorisvandenbossche.github.io/pandas-website-preview/pdeps/0008-inplace-methods-in-pandas.html), I think we won't add it in new places.

Specifically for reindex, this is an example of method that in practice can never be done in-place, so the inplace=True option would just be the same as doing df = df.reindex(..) under the hood.

[WillAyd]

Agree with @jorisvandenbossche here - we have been moving away from this API