Polars: py-1.32.1 Release

🚀 Performance improvements

• Optimise BytecodeParser usage from warn_on_inefficient_map (#23809)
• Lower extend_constant to the streaming engine (#23824)
• Lower pl.repeat to streaming engine (#23804)
• Remove redundant clone (#23771)

✨ Enhancements

• Lower rle_id to a native streaming node (#23894)
• Pass endpoint_url loaded from CredentialProviderAWS to scan/write_delta (#23812)
• Dispatch scan_iceberg to native by default (#23912)
• Lower unique_counts and value_counts to streaming engine (#23890)
• Support initializing from __arrow_c_schema__ protocol in pl.Schema (#23879)
• Better handle broken local package environment in show_versions (#23885)
• Implement dt.days_in_month function (#23119)
• Making Expr.rolling_*_by methods available to pl.Series (#23742)
• Fix errors on native scan_iceberg (#23811)
• Reinterpret binary data to fixed size numerical array (#22840)
• Make rolling_map serializable (#23848)
• Ensure CachingCredentialProvider returns copied credentials dict (#23817)
• Change typing for .remote() from LazyFrameExt to LazyFrameRemote (#23825)
• Implement repeat_by for Array and Null (#23794)
• Add DeprecationWarning on passing physical ordering to Categorical (#23779)
• Pre-filtered decode and row group skipping with Iceberg / Delta / scans with cast options (#23792)
• Update BytecodeParser opcode awareness for upcoming Python 3.14 (#23782)

🐞 Bug fixes

• Categorical namespace functions fail on Enum columns (#23925)
• Properly set sumwise complete on filter for missing columns (#23877)
• Restore Arrow-FFI-based Python<->Rust conversion in pyo3-polars (#23881)
• Group By with filters (#23917)
• Fix read_csv ignoring Decimal schema for header-only data (#23886)
• Ensure collect() native Iceberg always scans latest when no snapshot_id is given (#23907)
• Writing List(Array) columns to JSON without panic (#23875)
• Fill Iceberg missing fields with partition values if present in metadata (#23900)
• Create file for streaming sink even if unspawned (#23672)
• Update cloud testing environment (#23908)
• Parquet filtering on multiple RGs with literal predicate (#23903)
• Incorrect datatype passed to libc::write (#23904)
• Properly feature gate TZ_AWARE_RE usage (#23888)
• Improve identification of "non group-key" aggregates in SQL GROUP BY queries (#23191)
• Spawning tokio task outside reactor (#23884)
• Correctly raise DuplicateError on asof_join with suffix="" (#23864)
• Fix errors on native scan_iceberg (#23811)
• Fix index out of bounds panic filtering parquet (#23850)
• Fix error on empty range requests (#23844)
• Fix handling of hive partitioning hive_start_idx parameter (#23843)
• Allow encoding of pl.Enum with smaller physicals (#23829)
• Filter sorted flag from physical in CategoricalChunked (#23827)
• Remove accidental todo! in repeat node (#23822)
• Make meta.pop operate on Expr only (#23808)
• Stack overflow in DslPlan serde (#23801)
• Clear credentials cached in Python when rebuilding object store (#23756)
• Datetime selectors with mixed timezone info (#23774)
• Support i128 in asof join (#23770)
• Remove sleep for credential refresh (#23768)

📖 Documentation

• Improve StackOverflow links in contributing guide (#23895)
• Fix pyo3 documentation page link (#23839)
• Document the pureness requirements of udfs (#23787)
• Correct the name.* methods on their removal of aliases (#23773)

📦 Build system

• Workaround for pyiceberg make requirements on Python 3.13 (#23810)
• Add pyiceberg to dev dependencies (#23791)

🛠️ Other improvements

• Ensure clippy and rustfmt run in CI when changing pyo3-polars (#23930)
• Fix pyo3-polars proc-macro re-exports (#23918)
• Rewrite evaluate_on_groups for .gather / .get (#23700)
• Move Python C API to python-polars (#23876)
• Improve/fix internal LRUCache implementation and move into "_utils" module (#23813)
• Relax constraint on maximum Python version for numba (#23838)
• Automatically tag PRs mentioning "SQL" with the appropriate label (#23816)
• Update typos package (#23818)
• Fix typos path (#23803)
• Remove deserialize_with_unknown_fields (#23802)
• Add pyiceberg to dev dependencies (#23791)
• Remove old schema file (#23798)
• Mark more tests as ready for cloud (#23743)
• Reduce required deps for pyo3-polars (#23761)

Thank you to all our contributors for making this release possible! @JakubValtar, @Kevin-Patyk, @Liyixin95, @alexander-beedie, @cgevans, @cmdlineluser, @coastalwhite, @eitsupi, @gfvioli, @itamarst, @jimmmmmmmmmmmy, @kdn36, @math-hiyoko, @mcrumiller, @mpasa, @mrkn, @nameexhaustion, @orlp, @pka, @pomo-mondreganto, @ritchie46 and @stijnherfst