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Python Polars 1.0.0-alpha.1

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@github-actions github-actions released this 11 Jun 11:21
py-1.0.0-alpha.1
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💥 Breaking changes

  • Consistently convert to given time zone in Series constructor (#16828)
  • Update reshape to return Array types instead of List types (#16825)
  • Default to raising on out-of-bounds indices in all get/gather operations (#16841)
  • Native selector XOR set operation, guarantee consistent selector column-order (#16833)
  • Set infer_schema_length as keyword-only argument in str.json_decode (#16835)
  • Update set_sorted to only accept a single column (#16800)
  • Update group_by iteration and partition_by to always return tuple keys (#16793)
  • Default to coalesce=False in left outer join (#16769)
  • Remove pyxlsb engine from read_database (#16784)
  • Remove deprecated parameters in Series.cut/qcut and update struct field names (#16741)
  • Expedited removal of certain deprecated functionality (#16754)
  • Remove deprecated top_k parameters nulls_last, maintain_order, and multithreaded (#16599)
  • Update some error types to more appropriate variants (#15030)
  • Scheduled removal of deprecated functionality (#16715)
  • Enforce deprecation of offset arg in truncate and round (#16655)
  • Change default offset in group_by_dynamic from 'negative every' to 'zero' (#16658)
  • Constrain access to globals from DataFrame.sql in favor of top-level pl.sql (#16598)
  • Read 2D NumPy arrays as multidimensional Array instead of List (#16710)
  • Update clip to no longer propagate nulls in the given bounds (#14413)
  • Change str.to_datetime to default to microsecond precision for format specifiers "%f" and "%.f" (#13597)
  • Update resulting column names in pivot when pivoting by multiple values (#16439)
  • Preserve nulls in ewm_mean, ewm_std, and ewm_var (#15503)
  • Restrict casting for temporal data types (#14142)
  • Support Decimal types by default when converting from Arrow (#15324)
  • Remove serde functionality from pl.read_json and DataFrame.write_json (#16550)
  • Update function signature of nth to allow positional input of indices, remove columns parameter (#16510)
  • Rename struct fields of rle output to len/value and update data type of len field (#15249)
  • Remove class variables from some DataTypes (#16524)
  • Add check_names parameter to Series.equals and default to False (#16610)

⚠️ Deprecations

  • Deprecate LazyFrame.with_context (#16860)
  • Rename parameter descending to reverse in top_k methods (#16817)
  • Rename str.concat to str.join (#16790)
  • Deprecate arctan2d (#16786)

🚀 Performance improvements

  • Optimize string/binary sort (#16871)
  • Use split_at in split (#16865)
  • Use split_at instead of double slice in chunk splits. (#16856)
  • Don't rechunk in align_ if arrays are aligned (#16850)
  • Don't create small chunks in parallel collect. (#16845)
  • Add dedicated no-null branch in arg_sort (#16808)
  • Speed up dt.offset_by 2x for constant durations (#16728)
  • Toggle coalesce if non-coalesced key isn't projected (#16677)
  • Make dt.truncate 1.5x faster when every is just a single duration (and not an expression) (#16666)
  • Always prune unused columns in semi/anti join (#16665)

✨ Enhancements

  • Consistently convert to given time zone in Series constructor (#16828)
  • Improve read_csv SQL table reading function defaults (better handle dates) (#16866)
  • Support SQL VALUES clause and inline renaming of columns in CTE & derived table definitions (#16851)
  • Support Python Enum values in lit (#16858)
  • convert to give time zone in .str.to_datetime when values are offset-aware (#16742)
  • Update reshape to return Array types instead of List types (#16825)
  • Default to raising for oob on all get/gather operations (#16841)
  • Support SQL "SELECT" with no tables, optimise registration of globals (#16836)
  • Native selector XOR set operation, guarantee consistent selector column-order (#16833)
  • Extend recognised EXTRACT and DATE_PART SQL part abbreviations (#16767)
  • Improve error message when raising integers to negative integers, improve docs (#16827)
  • Return datetime for mean/median of Date colum (#16795)
  • Only accept a single column in set_sorted (#16800)
  • Expose overflowing cast (#16805)
  • Update group-by iteration to always return tuple keys (#16793)
  • Support array arithmetic for equally sized shapes (#16791)
  • Default to coalesce=False in left outer join (#16769)
  • More removal of deprecated functionality (#16779)
  • Removal of read_database_uri passthrough from read_database (#16783)
  • Remove pyxlsb engine from read_database (#16784)
  • Add check_order parameter to assert_series_equal (#16778)
  • Enforce deprecation of keyword arguments as positional (#16755)
  • Support cloud storage in scan_csv (#16674)
  • Streamline SQL INTERVAL handling and improve related error messages, update sqlparser-rs lib (#16744)
  • Support use of ordinal values in SQL ORDER BY clause (#16745)
  • Support executing polars SQL against pandas and pyarrow objects (#16746)
  • Remove deprecated parameters in Series.cut/qcut (#16741)
  • Expedited removal of certain deprecated functionality (#16754)
  • Remove deprecated functionality from rolling methods (#16750)
  • Update date_range to no longer produce datetime ranges (#16734)
  • Mark min_periods as keyword-only for rolling methods (#16738)
  • Remove deprecated top_k parameters (#16599)
  • Support order-by in window functions (#16743)
  • Add SQL support for NULLS FIRST/LAST ordering (#16711)
  • Update some error types to more appropriate variants (#15030)
  • Initial SQL support for INTERVAL strings (#16732)
  • More scheduled removal of deprecated functionality (#16724)
  • Scheduled removal of deprecated functionality (#16715)
  • Enforce deprecation of offset arg in truncate and round (#16655)
  • Change default of offset in group_by_dynamic from "negative every" to "zero" (#16658)
  • Constrain access to globals from df.sql in favour of top-level pl.sql (#16598)
  • Read 2D numpy arrays as Array[dt, shape] instead of Listst[dt] (#16710)
  • Activate decimal by default (#16709)
  • Do not propagate nulls in clip bounds (#14413)
  • Change .str.to_datetime to default to microsecond precision for format specifiers "%f" and "%.f" (#13597)
  • Remove redundant column name when pivoting by multiple values (#16439)
  • Preserve nulls in ewm_mean, ewm_std, and ewm_var (#15503)
  • Restrict casting for temporal data types (#14142)
  • Add many more auto-inferable datetime formats for str.to_datetime (#16634)
  • Support decimals by default when converting from Arrow (#15324)
  • Remove serde functionality from pl.read_json and DataFrame.write_json (#16550)
  • Update function signature of nth to allow positional input of indices, remove columns parameter (#16510)
  • Rename struct fields of rle output to len/value and update data type of len field (#15249)
  • Remove default class variable values on DataTypes (#16524)
  • Add check_names parameter to Series.equals and default to False (#16610)
  • Dedicated SQLInterface and SQLSyntax errors (#16635)
  • Add DIV function support to the SQL interface (#16678)
  • Support non-coalescing streaming left join (#16672)
  • Allow wildcard and exclude before struct expansions (#16671)

🐞 Bug fixes

  • Fix should_rechunk check (#16852)
  • Ensure read_excel and read_ods return identical frames across all engines when given empty spreadsheet tables (#16802)
  • Consistent behaviour when "infer_schema_length=0" for read_excel (#16840)
  • Standardised additional SQL interface errors (#16829)
  • Ensure that splitted ChunkedArray also flattens chunks (#16837)
  • Reduce needless panics in comparisons (#16831)
  • Reset if next caller clones inner series (#16812)
  • Raise on non-positive json schema inference (#16770)
  • Rewrite implementation of top_k/bottom_k and fix a variety of bugs (#16804)
  • Fix comparison of UInt64 with zero (#16799)
  • Fix incorrect parquet statistics written for UInt64 values > Int64::MAX (#16766)
  • Fix boolean distinct (#16765)
  • DATE_PART SQL syntax/parsing, improve some error messages (#16761)
  • Include pl. qualifier for inner dtypes in to_init_repr (#16235)
  • Column selection wasn't applied when reading CSV with no rows (#16739)
  • Panic on empty df / null List(Categorical) (#16730)
  • Only flush if operator can flush in streaming outer join (#16723)
  • Raise unsupported cat array (#16717)
  • Assert SQLInterfaceError is raised (#16713)
  • Restrict casting for temporal data types (#14142)
  • Handle nested categoricals in assert_series_equal when categorical_as_str=True (#16700)
  • Improve read_database check for SQLAlchemy async Session objects (#16680)
  • Reduce scope of multi-threaded numpy conversion (#16686)
  • Full null on dyn int (#16679)
  • Fix filter shape on empty null (#16670)

📖 Documentation

  • Update version switcher for 1.0.0 prereleases (#16847)
  • Update link from Python API reference to user guide (#16849)
  • Update docstring/test/etc usage of select and with_columns to idiomatic form (#16801)
  • Update versioning docs for 1.0.0 (#16757)
  • Add docstring example for DataFrame.limit (#16753)
  • Fix incorrect stated value of include_nulls in DataFrame.update docstring (#16701)
  • Update deprecation docs in the user guide (#14315)
  • Add example for index count in DataFrame.rolling (#16600)
  • Improve docstring of Expr/Series.map_elements (#16079)
  • Add missing polars.sql docs entry and small docstring update (#16656)

🛠️ Other improvements

  • Remove inner Arc from FileCacheEntry (#16870)
  • Do not update stable API reference on prerelease (#16846)
  • Update links to API references (#16843)
  • Prepare update of API reference URLs (#16816)
  • Rename allow_overflow to wrap_numerical (#16807)
  • Set infer_schema_length as keyword-only for str.json_decode (#16835)
  • Don't enter streaming engine for groupby-> agg mean/median … (#16810)
  • Improve safety of amortized_iter (#16820)
  • Remove needless inner type clone (#16718)
  • Fix incorrect debug assertion in ChunkedArray::from_chunks_and_dtype (#16697)
  • Update version resolver for 1.0.0 release (#16705)
  • Avoid AWS pinning to outdated crc32c version (#16681)

Thank you to all our contributors for making this release possible!
@JulianCologne, @KDruzhkin, @MarcoGorelli, @Object905, @alexander-beedie, @bertiewooster, @coastalwhite, @datenzauberai, @dependabot, @dependabot[bot], @henryharbeck, @marenwestermann, @mcrumiller, @montanarograziano, @nameexhaustion, @orlp, @ritchie46, @siddharth-gulia, @stinodego, @universalmind303 and @wence-

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orlp, wence-, and 18 other contributors
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