Python Polars 0.19.13

🏆 Highlights

• improve join performance through radix partitioned join (#12270)

⚠️ Deprecations

• Rename write_csv parameter has_header to include_header (#12351)
• Deprecate _saturating in duration string language, make it the default (#12301)
• Switch args for Decimal and set default scale=0 (#12224)
• Rename dt.seconds to dt.total_seconds (likewise for days, hours, minutes, milliseconds, microseconds, and nanoseconds) (#12179)
• Deprecate DataFrame.as_dict positional input (#12131)

🚀 Performance improvements

• indexvec in group-by (#12371)
• Reduce allocations in hash join (#12368)
• Change concurrency parameters (#12321)
• Improve join performance through radix partitioned join (#12270)
• Remove extra multiplication in hash_to_partition (#12233)
• Allow non-power-of-two partitions (#12225)
• Reduce compute in error message for failed datetime parsing (#12147)

✨ Enhancements

• Updated BytecodeParser for Python 3.12 (#12348)
• Add round_sig_figs expression for rounding to significant figures (#11959)
• Change concurrency parameters (#12321)
• Deprecate _saturating in duration string language, make it the default (#12301)
• Auto-infer ambiguous for truncate and round (#12204)
• Allow construction of Datetime series from datetime.date array (#12175)
• New Config options for numeric formatting: digit grouping and thousands/decimal separator (#12099)
• Allow non-aggregation predicate in ternary groupby (#12286)
• Add name= in .write_avro to set schema name (#12255)
• Update write_delta to write large arrow types without casting (#12260)
• Add support for reading zstd compressed files (no-options) in read_csv (#12214)
• Start prefetching all files immediately (#12201)
• Expose more options to plugin registration (#12197)
• Add .list.to_array expression (#12192)
• Consolidate & improve all casting failure error messages (#12168)
• Add Binary dtype to hypothesis tests (#12140)
• Tunable concurrency (#12171)
• Support reverse sort in streaming (#12169)
• Add .arr.to_list expression (#12136)
• Support decimals in assert utils (#12119)
• Add concurrency budget (#12117)
• Improved support for use of file-like objects with DataFrame "write" methods (#12113)
• Introduce ignore_nulls for str.concat (#12108)

🐞 Bug fixes

• Do not cast lit if has same dtype (#12342)
• Fix index column name of rolling/dynamic group by (#12365)
• Ternary broadcasting with empty truthy or falsy and agg predicate (#12357)
• UInt64 should be correctly extracted from python object (#12338)
• Ignore IDE-mediated DeprecationWarning when debugging tests under 3.12 (#12343)
• expr_output_name include literal (#12335)
• Fix Decimal dtype table repr (#12318)
• Fix behavior of month intervals in date_range (#12317)
• Scan empty csv miss row_count (#12316)
• zip_with also broadcast mask (#12309)
• respect hive_partitioning flag when dealing with multiple files (#12315)
• parquet, add row_count to empty file materialization (#12310)
• Fix invalid DeprecationWarning generated from date_range defined with 'saturating' interval (#12311)
• fix download ranges in parquet (#12313)
• object store path derivation for local URL (#12308)
• don't move right endpoint of windows in rolling in default offset==-period case (#12267)
• Raise more informative error on invalid reshape input (#12288)
• incorrect super type for literals in nested binary exprs (#12238)
• typo in exception message (#12278)
• fix ambiguous aggregation type (#12269)
• return frames from read_excel in the originally specified order (#12243)
• Consistently propagate nulls for numpy ufuncs (#12212)
• respect return_scalar of list scalars (#12251)
• fix plugins system on Windows (#12230)
• potential overflow (#12206)
• always start a new thread if the thread is already blocking (#12202)
• with_row_count should block predicate push down for lazy csv (#12187)
• rechunk failed-list series before iterate (#12189)
• Fix interchange protocol boolean buffer size (#12177)
• fix incorrect desc sort behavior (#12141)
• take should block predicate pushdown (#12130)
• use null type when read from unknown row (#12128)
• boundary predicate to block all accumulated predicates in push down (#12105)
• make python schema_overrides information available to the rust-side inference code when initialising from records/dicts (#12045)
• fix panic when initializing Series with array of list dtype (#12148)
• Fix schema of arr.min/max (#12127)
• ensure filter predicate inputs exist in schema (#12089)
• Update null_count after arithmetic (#12280)

🛠️ Other improvements

• Workaround for maturin issue (#12370)
• Fix incorrect boundary column name in group_by_dynamic docstrings (#12366)
• Fix typo in rolling_* docstrings (#12362)
• Fix ruff linting invocation (#12350)
• Clean up conversion utils (#11789)
• Organize Cargo.toml (#12323)
• Consolidate "getting started" and "user guide" sections (#12246)
• Minor updates to prepare for Python 3.12 support (#12314)
• Move script for testing map warning (#12306)
• simplify expr checking in predicate push down (#12287)
• Remove external link (#12223)
• Fix rebase issue breaking CI (#12296)
• Add top-level make clippy, simplify Rust linting workflows (#12290)
• ensure we git-ignore ALL .venv dirs (#12289)
• incorrect super type for literals in nested binary exprs (#12238)
• Remove recommended setting from IDE docs (#12275)
• Clean up Python test workflow (#12261)
• clarify contains selector (#12265)
• Add py-polars to Cargo workspace (#12256)
• Use .with_columns in some docstrings (#12250)
• Add test for scan_csv plus slice (#12239)
• Fix emphasis formatting in docstring (#12240)
• Fix emphasis formatting in docstring (#12237)
• add deprecation notices to the docs for expressions moved into the new name namespace (#12236)
• update Cargo.lock (#12226)
• make sort test work with unstable sort (#12221)
• Build Python wheels on manylinux_2_28 (#12211)
• Include rust-toolchain.toml with sdist/wheels (#12184)
• Standardize project name formatting across docs (#12185)
• Update sqlparser to 0.39 (#12173)
• pin ring (#12176)
• Improve strip_{prefix, suffix} & strip_chars_{start, end} (#12161)
• Fix tests for pyarrow 14 (#12170)
• Fix rendering of note in DataFrame.fold (#12164)
• Fix triggers for docs deployment (#12159)
• Refactor some tests (#12121)
• Consolidate contributing info (#12109)
• Fix typo in user-guide/expressions/plugins.md (#12115)
• Render docstring text in single backticks as code (#12096)
• use more ergonomic syntax in select/with_columns where possible (#12101)
• Update CODEOWNERS (#12107)
• visualize plugin directory layout in user guide (#12092)
• Minor tweak in code example in section Expressions/Aggregation (#12033)
• Minor tweak in code example in section Expressions/Missing data (#12080)
• Minor improvements to the docs website (#12084)

Thank you to all our contributors for making this release possible!
@JulianCologne, @MarcoGorelli, @Priyansh121096, @alexander-beedie, @cmdlineluser, @daviskirk, @dependabot, @dependabot[bot], @dgilman, @hirohira9119, @ion-elgreco, @jrycw, @mcrumiller, @moritzwilksch, @nameexhaustion, @orlp, @owrior, @rancomp, @reswqa, @ritchie46, @rob-sil, @stefmolin, @stinodego and @wsyxbcl