DOC: add plotting backends in visualization.rst

[rushabh-v]

• closes DOC: plotting backend is not mentioned in the user guide #30984

[WillAyd]

@jorisvandenbossche

[jorisvandenbossche]

Thanks for the PR!

[datapythonista]

Looks good, well explain, thanks for the work on this.

There is just one thing I don't see clear. I think we may be adding content for two different audiences here. I think in the visualization user guide it makes sense to explain that other plotting backends exist, and how to use them. But I think the last part is not for pandas users, but for developers of pandas extensions. I think this should be in the Development documentation. We can surely link from the user guide there, but I don't think a "regular" pandas users cares about how to define entry points in setup.py. Does that make sense?

[jorisvandenbossche]

There is just one thing I don't see clear. I think we may be adding content for two different audiences here. I think in the visualization user guide it makes sense to explain that other plotting backends exist, and how to use them. But I think the last part is not for pandas users, but for developers of pandas extensions. I think this should be in the Development documentation.

Yes, what this PR is adding is meant for users, the development part already exists: https://dev.pandas.io/docs/development/extending.html#plotting-backends. See also my first review comment to remove this part here in the PR (and replace it with a link, what you said :-))

[datapythonista]

Saw the other comments but missed that one. Agree with all points. :)

[rushabh-v]

Can you review this PR, please?

[rushabh-v]

thanks, @jorisvandenbossche for those corrections. The linting is clear now.

[rushabh-v]

does it require any change now?

[jorisvandenbossche]

Thanks!