ENH: Add a "level=" kwarg to .rename_axis(), for partial renaming of multi-index

[gwerbin]

Feature Type

• Adding new functionality to pandas

• Changing existing functionality in pandas

• Removing existing functionality in pandas

Problem Description

Often when working with DataFrame multi-indexes, I end up with one index level that needs to be renamed. This is something I routinely face after stack/unstack, pivot, concat, and groupby operations.

Currently, we can use .rename_axis() with a mapping or list, but neither solution lets me pick an index level by position and rename it, which is useful if I have more than one unnamed or incorrectly-named level. You can also assign to .index.names, but you have the same issue there, because .index.names is generally immutable.

Feature Description

I am not sure about implementation. Ideally it would use the same internal dispatch mechanisms as the rest of

Alternative Solutions

As far as I can tell, the alternative solution is to do nothing. I don't see a sensible alternative that fits in with the Pandas API design.

Additional Context

This has been asked about at least once on StackOverflow: https://stackoverflow.com/q/70812332/2954547

[mroeschke]

Thanks for the request but it appears there hasn't been much interest in this issue from the core team and community over the years so closing.