BUG: Fix Series.str.contains with compiled regex on Arrow string dtype (#61942)

[Aniketsy]

#61942

This PR fixes an issue in Series.str.contains() where passing a compiled regex object failed when the underlying string data is backed by PyArrow.

Please, provide feedback if my approach is not correct , I would love to improve and contribute in this.

[Aniketsy]

Hi @mroeschke
I've worked on the issue
BUG: Fix Series.str.contains with compiled regex on Arrow string dtype ([#61942])
and have opened a pull request for it.

I'd appreciate it if you could take a look and share your feedback.
Please let me know if anything needs to be improved or clarified.

Thanks!

[mroeschke]

This fix should go into _str_contains of ArrowExtensionArray

[Aniketsy]

Thankyou for the feedback!
I will update that.

[jorisvandenbossche]

Additionally, if this is something that is not implemented by pyarrow, we should not raise a NotImplementedError, but fall back on the python object implementation (you can see a similar pattern in some other str methods, like ArrowStringArray._str_replace)

[Aniketsy]

@jorisvandenbossche Thank you for the feedback! I will update the PR accordingly.

Would you mind letting me know the reason behind the one failing check (pre-commit.ci)?
Thanks again!

[jorisvandenbossche]

Would you mind letting me know the reason behind the one failing check (pre-commit.ci)?

ruff is failing, which is used for auto formatting. I would recommend to install the pre-commit locally to avoid having this fail on CI: https://pandas.pydata.org/docs/dev/development/contributing_codebase.html#pre-commit