pola-rs/polars py-0.19.3

Python Polars 0.19.3

on GitHub

🏆 Highlights

• Polars plugins (#10924)

⚠️ Deprecations

• Rename is_first/last to is_first/last_distinct (#11130)
• Rename count_match to count_matches (#11028)
• Rename strip to strip_chars (#10813)
• Add datetime_range expression function (#10213)

🚀 Performance improvements

• optimize _unpack_schema() (#11080)
• optimize polars.utils._post_apply_columns() (#11086)
• optimize polars.utils._post_apply_columns() (#11041)
• optimize _unpack_schema() (#10960)
• improve performance of fast projection (#10945)

✨ Enhancements

• Expressify str.split argument. (#11117)
• Polars plugins (#10924)
• better async_collect (#10912)
• Expressify argument of binary contains (#11091)
• dt.offset_by supports broadcasting lhs (#11095)
• Expressify argument of binary starts_with and ends_with (#11076)
• add OpenOffice spreadsheet support via new pl.read_ods function (#11011)
• json_extract supports extract static and string value to list dtype (#11057)
• add quote_style="never" option for write_csv (#11015)
• Add literal for str count_match (#10996)
• More dtypes supports cast to list (#11025)
• Add strip_prefix and strip_suffix to the string namespace (#10958)
• improve read_excel table data identification (#10953)
• Add from_dataframe fast path and improve typing (#10979)
• add openpyxl as a new/optional engine for read_excel (#6183)
• Add datetime_range expression function (#10213)

🐞 Bug fixes

• Correct hash and fmt for struct expr (#11119)
• enforce sortedness of by argument in rolling_* functions (#11002)
• Make Series.__getitem__ raise an IndexError (#11061)
• Filter on empty objectChunked should not throw error (#11073)
• ensure null_count statistics accounts for null array (#11070)
• toggle off cse if ext_context is used (#11051)
• Correct field dtype of string concat (#11055)
• fix partial schema init with read_dicts and reduce latency of small-frame creation (#11047)
• pushed-down expr should be considered when evaluating ExternalContext (#11023)
• fix rolling_* functions when "by" has nanosecond resolution (#11005)
• Don't reuse member for Selector::Add (#11026)
• ensure series_equal properly accounts for dtypes when strict=True (#11012)
• fix the construction of List<Null> (#10969)
• write_excel "hidden_columns" parameter fails when taking a selector (#10987)
• allow singular null in regex pattern (#10948)
• compute length of null array in explode (#10946)

🛠️ Other improvements

• remove low contrast coloring from visited links (#11133)
• Ignore matplotlib warning (#11129)
• Do not run user guide examples by default (#11128)
• Ignore matplotlib mypy warnings (#11126)
• Add deprecation message in groupby docs (#11121)
• Removed duplicated example (#11109)
• Add CODEOWNERS for docs folder (#11107)
• Refactor starts_with and ends_with for string (#11085)
• Integrate user guide (#11089)
• remove mentions of the deprecated random module (#11087)
• simplify SchemaDefinition type alias (#11077)
• put fetch explanation in a "notes" block to better highlight it in the docs (#11058)
• remove feature gate join/groupby in polars-core (#10965)
• Add Documentation issue type (#11042)
• warn that "by" argument must be sorted for results to be correct in rolling_* functions (#11013)
• Adds missing method refs in LazyDataFrame API docs (#11027)
• Add lint for boolean trap (#11010)
• Add private LazyFrame method for setting sink optimizations (#10988)
• Enable a few more ruff lints (#10998)
• document polars string duration language in temporal range functions (#10978)
• Additional tests for interchange get_data_buffer (#10966)
• genericize PolarsDataType (#10952)
• Document that filter, drop_nulls, left join preserve order (#10955)
• add note about adbc flight sql driver (#10949)
• Revert pydantic >= 2.0.0 requirement (#10944)
• note that pl.duration represents fixed durations, point to offset_by for non-fixed (#10927)
• Test S3 functionality using moto server (#10164)

Thank you to all our contributors for making this release possible!
@I8dNLo, @KacpiW, @MarcoGorelli, @Object905, @Qqwy, @TNieuwdorp, @alexander-beedie, @antoniocali, @bvanelli, @cjackal, @henrikig, @jakob-keller, @mrogowski11, @nameexhaustion, @orlp, @reswqa, @ritchie46, @s-banach, @stinodego, @svaningelgem and @thomasjpfan