py-1.39.1

pola-rs/polarspy-1.39.1Mar 17, 2026by github-actions[bot]

AI Summary

This release fixes a bug in the streaming engine regarding empty rolling windows and improves documentation.

Key Highlights

Handle empty rolling windows in streaming engine (#26903)

Full Release Notes

## 🐞 Bug fixes

- Handle empty rolling windows in streaming engine (#26903)

## 📖 Documentation

- Add documentation for on\_columns for LazyFrame pivot (#26859)

## 🛠️ Other improvements

- Bump build deps used in ARM64 Windows release pipeline (#26892)

Thank you to all our contributors for making this release possible!
@Kevin-Patyk, @RenzoMXD, @TNieuwdorp, @dsprenkels, @gautamvarmadatla, @nameexhaustion, @nicholaslegrand102 and @ritchie46