Polars: py-0.20.23 Release

🏆 Highlights

• Add a low-friction sql method for DataFrame and LazyFrame (#15783)

🚀 Performance improvements

• Don't rechunk in parallel collection (#15907)
• Improve non-trivial list aggregations (#15888)
• Ensure we hit specialized gather for binary/strings (#15886)
• Limit the cache size for to_datetime (#15826)
• skip initial null items and don't recompute slope in interpolate (#15819)

✨ Enhancements

• don't require pyarrow for converting pandas to Polars if all columns have simple numpy-backed datatypes (#15933)
• Add option to disable globbing in csv (#15930)
• Add option to disable globbing in parquet (#15928)
• Expressify dt.round (#15861)
• Improve error messages in context stack (#15881)
• Add dynamic literals to ensure schema correctness (#15832)
• add timestamp time travel in delta scan/read (#15813)

🐞 Bug fixes

• Set default limit for String column display to 30 and fix edge cases (#15934)
• Change recognition of numba ufunc (#15916)
• series.search_sorted could support more types of input (#15940)
• Remove ffspec from parquet reader (#15927)
• avoid WRITE+EXEC for CPUID check (#15912)
• fix inconsistent decimal formatting (#15457)
• Preserve NULLs for is_not_nan (#15889)
• double projection check should only take the upstream projections into account (#15901)
• Ensure we don't create invalid frames when combining unit lit + … (#15903)
• Clear cached rename schema (#15902)
• Fix OOB in struct lit/agg aggregation (#15891)
• Refine interaction of "schema_overrides" with read_excel when using "calamine" engine (#15827)
• Don't modify user-supplied storage_options dict (take a shallow-copy) (#15859)
• create (q)cut labels in fixed order (#15843)
• Tag shrink_dtype as non-streaming (#15828)

📖 Documentation

• improve graphviz install documentation/error message (#15791)
• Extend docstring examples for asof_join (#15810)

📦 Build system

• Don't import jemalloc (#15942)
• Use default allocator for lts-cpu (#15941)
• replace all macos-latest referrals with macos-13 (#15926)
• pin mimalloc and macos-13 (#15925)
• use jemalloc in lts-cpu (#15913)
• Update Cargo.lock (#15865)
• Bump ruff version and improve make clean on the Python side (#15858)
• Exclude rust-toolchain.toml from wheels (#15840)

🛠️ Other improvements

• Replace copy/paste import handling with import_optional utility function (#15906)
• Reorganize from_iter and dispatch to collect_ca when possible (#15904)
• More PyO3 0.21 bound APIs (#15872)
• Improve type-coercion (#15879)
• Move type coercion to IR conversion phase (#15868)
• Fix Python test coverage upload (#15853)
• More upgrades to PyO3 0.21 Bound<> APIs (#15790)
• Use uv for installing Python dependencies in CI (#15848)
• Update benchmark tests (#15825)

Thank you to all our contributors for making this release possible! @JulianCologne, @MarcoGorelli, @NedJWestern, @NexVeridian, @alexander-beedie, @deanm0000, @dependabot, @dependabot[bot], @ion-elgreco, @itamarst, @jr200, @nameexhaustion, @orlp, @reswqa, @ritchie46 and @stinodego