Published August 1, 2026 | Version py-1.43.2
Software Open

pola-rs/polars: Python Polars 1.43.2

Authors/Creators

  • 1. Polars
  • 2. PhD Candidate, Radboud University
  • 3. Quansight
  • 4. @aertslab
  • 5. @pola-rs
  • 6. CWI
  • 7. @Quantco
  • 8. University of California, Berkeley

Description

⚠️ Deprecations

  • Deprecate casts from Categorical to integer dtypes (#28525)
  • Deprecate not setting the plan_stage argument in show_graph() (#28391)

🚀 Performance improvements

  • Pushdown len() to concat/union inputs (#28570)

✨ Enhancements

  • Issue FutureWarning on using from_arrow of ArrowStreamExportable (#28442)
  • Add infer_schema_files parameter to scan_csv (#28440)

🐞 Bug fixes

  • Properly propagate enum metadata for iceberg column mapping (#28580)
  • Correctly write parquet field IDs for enums and categoricals (#28581)
  • Fix arrow C interop binview offset (#28623)
  • Fix duplicate hive values in hive pre-partition rewrite (#28621)
  • Double-counted offset for Arrow export of sliced Series(Array) (#28602)
  • Struct/List/Array equality handling in sort and join (#28601)
  • More careful slice pushdown into joins (#28578)
  • Preserve ordering in sliced unions (#28576)
  • Drop input sortedness when casting to a string (#28574)
  • Clear sortedness flags in StringChunked substring kernels (#28573)
  • Bad mask handling when reading optional parquet column (#28547)
  • Any operation on Unknown(Int) and Unknown(Float) should result in Unknown(Float) (#28545)
  • Flip nulls_last after Expr.reverse() (#28572)
  • Fix high blocking thread use in sink_parquet with async local path (#28543)
  • Serialize LazyFrames backed by bytes (#28568)
  • Release GIL in SQLContext.execute() (#28549)
  • Propagate nulls_last in function_expr_sortedness (#28544)
  • Incorrect slicing when a join requires sorting (#28541)

🛠️ Other improvements

  • Fix duckdb delta extension install collision (#28607)

Thank you to all our contributors for making this release possible! @BitWeaverDev, @Matt711, @Samoilov2004, @borchero, @dancsi, @dsprenkels, @kdn36, @masumi-ryugo, @nameexhaustion and @ritchie46

Files

pola-rs/polars-py-1.43.2.zip

Files (7.1 MB)

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Additional details

Related works

Is supplement to
Software: https://github.com/pola-rs/polars/tree/py-1.43.2 (URL)

Software

Repository URL
https://github.com/pola-rs/polars