TYP #37715: Fix mypy errors in column.py

[bang128]

• xref TYP: investigate/fix ignored mypy errors #37715
• Tests added and passed if fixing a bug or adding a new feature
• All code checks passed.
• Added type annotations to new arguments/methods/functions.
• Added an entry in the latest doc/source/whatsnew/vX.X.X.rst file if fixing a bug or adding a new feature.

[WillAyd]

I think you need to add the @property decorator to get this to work with mypy

[bang128]

I added it in my first commit, but the tests failed, so I tried removing @Property

[WillAyd]

Huh strange - I guess that's why this was ignored before. That said, I think the property decorator is correct, at least according to the dataframe protocol

https://data-apis.org/dataframe-protocol/latest/API.html

So I think you can update the tests and add a whatsnew note describing this as a bug fix

@jorisvandenbossche

[jorisvandenbossche]

That said, I think the property decorator is correct, at least according to the dataframe protocol

https://data-apis.org/dataframe-protocol/latest/API.html

Hmm, the documentation seems to be not up to date. This was originally a property, but changed to a method a while ago (data-apis/dataframe-api#74 (comment)), so the currently implementation here is actually correct.

[mroeschke]

Thanks for the pull request, but I believe this was addressed and fixed in #50565 so closing. Happy to have your contributions on any other typing issues!