Python Polars 0.20.22

🚀 Performance improvements

• Improved type-inference for read_excel and read_ods, use calamine engine for read_ods (#15808)
• Fix quadratic in binview growable same source (#15734)
• use two binary searches for equality mask when data is sorted (#15702)
• improve filter parallelism (#15686)

✨ Enhancements

• Minor type-inference update for read_database (#15809)
• Improved type-inference for read_excel and read_ods, use calamine engine for read_ods (#15808)
• dt.truncate supports broadcasting lhs (#15768)
• Expressify str.json_path_match (#15764)
• raise if storage_options is passed to read_csv but fsspec isnt available (#15778)
• Support decimal float parsing in CSV (#15774)
• Add context trace to LazyFrame conversion errors (#15761)
• Improve error message when passing invalid input to lit (#15718)
• Remove outdated join validation checks (#15701)

🐞 Bug fixes

• drop-nulls edge case; remove drop-nulls special case (#15815)
• ewm_mean_by was skipping initial nulls when it was already sorted by "by" column (#15812)
• Consult cgroups to determine free memory (#15798)
• raise if index count like 2i is used when performing rolling, group_by_dynamic, upsample, or other temporal operatios (#15751)
• Don't deduplicate sort that has slice pushdown (#15784)
• Allow passing files opened by fsspec in read_parquet (#15770)
• Fix incorrect is_between pushdown to scan_pyarrow_dataset (#15769)
• Handle null index correctly for list take (#15737)
• Preserve lexical ordering on concat (#15753)
• Remove incorrect unsafe pointer cast for int -> enum (#15740)
• pass series name to apply for cut/qcut (#15715)
• count of null column shouldn't panic in agg context (#15710)
• manual cache (#15711)
• Ensure we don't hold onto Mutex when grabbing join tuples (#15704)
• allow null dtypes in UDFs if they match the schema (#15699)
• Respect join_null argument for semi/anti joins (#15696)
• Ensure we don't hold RwLock when spawning group parallelism in w… (#15697)
• Ensure empty with_columns is a no-op (#15694)
• Include predicate in cache state union (#15693)
• Add the missing feature flag for ewm_mean_by (#15687)
• 8/16-bits int could also apply in place for log expr (#15680)
• prepare_expression_for_context shouldn't panic if exceptions raised from optimizer (#15681)

📖 Documentation

• Add docstring examples for datetimes (#13161) (#15804)
• Fix a typo in categorical section of the user guide (#15777)
• Fix a docstring mistake for DataType.is_float (#15773)
• Remove incorrect "1i (1 index count)" from some docs methods (#15750)
• Add example for Config.set_tbl_width_chars (#15566)
• Align docstring phrasing in Series/Expr.dt.truncate/round (#15698)
• Various deprecation docstring improvements (#15648)

🛠️ Other improvements

• Always expand horizontal_any/all (#15816)
• Rename decimal_float to decimal_comma (#15817)
• Split coverage calculation (#15780)
• Update readme (#15787)
• Start at using new Bound<> API from PyO3 (#15752)
• Make json_path_match expr non-anonymous (#15682)

Thank you to all our contributors for making this release possible!
@MarcoGorelli, @NedJWestern, @Robinsane, @TobiasDummschat, @alexander-beedie, @c-peters, @dependabot, @dependabot[bot], @gasmith, @henryharbeck, @itamarst, @kszlim, @mbuhidar, @nameexhaustion, @orlp, @reswqa, @ritchie46, @stinodego and @wsyxbcl