pola-rs/polars py-0.17.15

Python Polars 0.17.15

on GitHub

🏆 Highlights

• Array (backed by arrow::FixedSizeList datatype (#8943)
• Write dataframes as delta tables (#7616)

🚀 Performance improvements

• improve list explode perf (#8974)
• Improve explodes: offsets_to_indexes performance (#8964)
• avoid quadratic exclude behaviour when selecting against dtypes and/or wildcards (#8953)
• use simd-json for all json parsing (#8922)
• improve performance of align_frames, and add new alignment option (#8899)

✨ Enhancements

• error on invalid sortby expr (#8986)
• Pushdown is_in to pyarrow dataset (#8930)
• allow set column list input to 'drop' and 'drop_nulls' (#8962)
• Array (backed by arrow::FixedSizeList datatype (#8943)
• Add dtype argument for repeat (#8946)
• Use schema keys to define the columns if only the schema is provided to pl.struct (#8952)
• multiple enhancements for SQLContext (#8944)
• add sql UNION, UNION ALL & UNION DISTINCT (#8936)
• add sql compound identifiers (#8934)
• add sql EXCLUDE (#8913)
• add sql CASE (#8911)
• add sql EXPLAIN (#8897)
• Write dataframes as delta tables (#7616)
• improve performance of align_frames, and add new alignment option (#8899)
• improved inference from type annotations (#8895)

🐞 Bug fixes

• Fix erroneous warning in hist (#8982)
• don't modify Series with empty names in-place on DataFrame init (#8956)
• respect rechunk in parquet (#8935)
• Add hint on PyArrow to ADBC import error (#8898)
• Simplify offsets_to_indexes, fix empty offsets edge cases (#8920)
• sql qualified wildcards (#8916)
• address edge cases with in-place modification of Series objects (#8915)
• don't check sortedness in asof by (#8906)
• check for object type in csv writer (#8894)
• improve performance of align_frames, and add new alignment option (#8899)
• window function with filtered groups (#8880)

🛠️ Other improvements

• deprecate rename "in_place" parameter (#8960)
• Clean up tests for repeat (#8979)
• Deprecate name argument for repeat (#8977)
• simplify take_every (#8971)
• Clean up repeat/ones/zeros (#8963)
• further enhance SQLContext docstrings (#8948)
• docs(python) Fix typo in lazygroupby.rs error message (#8937)
• fix docstring for time() (#8939)
• refactor tzinfo-related tests (#8883)

Thank you to all our contributors for making this release possible!
@CloseChoice, @MarcoGorelli, @alexander-beedie, @avimallu, @cbowdon, @chitralverma, @jonashaag, @kpberry, @mcrumiller, @petar-savov, @ritchie46, @stinodego and @universalmind303