# Polars 1.35.2 — Python Polars 1.35.2

- Product: Polars (https://whatsnew.fyi/product/polars)
- Vendor: Polars
- Date: 2025-11-09
- Version: 1.35.2
- Original notes: https://github.com/pola-rs/polars/releases/tag/py-1.35.2
- Permalink: https://whatsnew.fyi/product/polars/releases/1.35.2

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Fix incorrect drop_nans() result when used in group_by() / over()
- **fixed** — Fix handling Null dtype in ApplyExpr on group_by
- **fixed** — Fix assertion panic on group_by
- **fixed** — Fix wide-table join performance regression

* Fix incorrect `drop_nans()` result when used in `group_by()` / `over()` (https://github.com/pola-rs/polars/pull/25146)
* Fix handling `Null` dtype in `ApplyExpr` on `group_by`(https://github.com/pola-rs/polars/pull/25077)
* Fix assertion panic on `group_by` (https://github.com/pola-rs/polars/pull/25179)
* Fix Wide-table join performance regression (https://github.com/pola-rs/polars/pull/25222)

Thank you to all our contributors for making this release possible!
@coastalwhite, @kdn36, @nameexhaustion and @ritchie46