# Polars 1.36.1 — Python Polars 1.36.1

- Product: Polars (https://whatsnew.fyi/product/polars)
- Vendor: Polars
- Date: 2025-12-10
- Version: 1.36.1
- Original notes: https://github.com/pola-rs/polars/releases/tag/py-1.36.1
- Permalink: https://whatsnew.fyi/product/polars/releases/1.36.1

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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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- **changed** — Tune partitioned sink_parquet cloud performance
- **added** — Allow creation of Object literal
- **changed** — Don't collect schema in SQL union processing
- **fixed** — Don't invalidate node in cluster-with-columns
- **fixed** — Add missing type stubs for bin_slice, bin_head, and bin_tail
- **fixed** — Binary slice methods missing from Series and docs
- **fixed** — Mix-up of variable_name/value_name in unpivot
- **fixed** — Invalid usage of drop_first in to_dummies when nulls present
- **changed** — Upgrade to latest version of sqlparser-rs
- **fixed** — Update slab to version without RUSTSEC

##### 🚀 Performance improvements

- Tune partitioned sink\_parquet cloud performance (#25687)

##### ✨ Enhancements

- Allow creation of `Object` literal (#25690)
- Don't collect schema in SQL union processing (#25675)

##### 🐞 Bug fixes

- Don't invalidate node in cluster-with-columns (#25714)
- Move `boto3` extra from s3fs in dev requirements (#25667)
- Add missing type stubs for `bin_slice`, `bin_head`, and `bin_tail` (#25697)
- Binary slice methods missing from Series and docs (#25683)
- Mix-up of variable\_name/value\_name in unpivot (#25685)
- Invalid usage of `drop_first` in `to_dummies` when nulls present (#25435)

##### 📖 Documentation

- Fix typos in Excel and Pandas migration guides (#25709)
- Add "right" to `how` options in `join()` docstrings (#25678)

##### 🛠️ Other improvements

- Move Object `lit` fix earlier in the function (#25713)
- Remove unused decimal file (#25701)
- Move `boto3` extra from s3fs in dev requirements (#25667)
- Upgrade to latest version of `sqlparser-rs` (#25673)
- Update slab to version without RUSTSEC (#25686)
- Fix typo (#25684)

Thank you to all our contributors for making this release possible!
@AndreaBozzo, @Kevin-Patyk, @alexander-beedie, @dsprenkels, @jamesfricker, @mcrumiller, @nameexhaustion, @orlp and @ritchie46