Narwhals v1.2.0

Changes

• Feat: Series.shift Pyarrow Backend Implementation (#590)
• move over dask dt attributes tests (#704)

🚀 Performance improvements

• perf: only use as_py for pyarrow when necessary (before pyarrow 13) (#724)

✨ Enhancements

• feat: arrow and dask expr clip method (#729)
• feat: add dask Expr.std (#734)
• feat: support reductions in lazyframe.select for Dask (#723)
• feat: DaskLazyFrame unique method (#726)
• feat: DaskLazyFrame join and sort, DaskNamespace all (#725)
• feat: add group_by to dask (#718)
• feat: add series and expr clip method (#701)
• feat: Add Expr.round to Dask (#709)
• feat: add strip_chars to string namespace (#715)
• feat: ArrowGroupBy.__iter__ method (#717)
• feat: arrow expr over method (#721)
• feat: dask with_row_index and rename (#692)
• feat: dask equality and inequality operators (#708)
• feat: add round to Arrow (#696)
• feat: dask any_horizontal and generalize all_horizontal (#693)
• feat: Dask frame drop method (#699)
• feat: dask schema and collect_schema (#688)
• feat: add dask Expr.max and test (#691)
• feat: add dask Expr.min and test (#690)

🐞 Bug fixes

• patch: pandas-like and pyarrow scalar reduction fix (#716)

📖 Documentation

• docs: how it works bulletpoint indentation (#719)
• docs: Fix how-it-works, add favicon+logo (#710)
• docs: correction of how_it_works.md (#707)
• docs: Contributing guide correction (#706)
• docs: fix todo, avoid lazyframe collect_schema warning (#687)
• docs: explain translation from narwhals api to native api (#684)

🛠️ Other improvements

• ci: fix import error from dask test (#737)
• ci: fix ci from pytest importerror (#736)
• test: improve coverage for from_native (dask) (#733)
• test: toggle coverage for dask group_by (#732)
• chore: Factor all remaining tests out of test_common.py (#720)
• chore: remove dask_test completely (#705)
• chore: moving most dask tests over to the main test suite (#703)
• test: mark failing dask tests, add dask to constructor (#697)

Thank you to all our contributors for making this release possible!
@DeaMariaLeon, @FBruzzesi, @MarcoGorelli, @aidoskanapyanov, @aivanoved, @amol-, @anopsy, @condekind, @lucianosrp, @mfonekpo and @mistShard

Narwhals v1.1.9

Changes

• Feat: Dask filter and and method added (#676)
• bug: fix iter_rows inconsistency in pandas (#671)

🚀 Performance improvements

• perf: some comprehensions over loops (#679)

✨ Enhancements

• feat: add fill_null to DaskExpr (#685)
• feat: add drop_nulls for dask (#675)
• feat: dask columns property & filter method (#670)
• feat: dask select method (#667)
• feat: add year, month, day, hour, minute, second, millisecond, micros… (#666)
• feat: add to_lowercase, to_uppercase, to_datetime for dask (#665)
• feat: add ends_with, contains, slice for dask (#664)
• feat: Added Dask Expr.sum (#662)

🐞 Bug fixes

• fix: dask expr dt.nanosecond implementation (#678)

📖 Documentation

• doc: Made changes to the file explaining the UserWarning error while using pandas `group_by's (#677)

🛠️ Other improvements

• tests: add pytest-env to dev requirements (#683)
• ci: adopt uv (#682)
• chore: factor system_info tests outside test_common (#680)
• test: xfail uppecase for dask and pyarrow 11.0.0 (#672)
• chore: enable more lazy tests (#663)

Thank you to all our contributors for making this release possible!
@DeaMariaLeon, @EdAbati, @FBruzzesi, @MarcoGorelli, @aidoskanapyanov, @benrutter, @lucianosrp, @mistShard and @montanarograziano

Narwhals v1.1.8

Changes

• skip changelog(deps): bump sigstore/gh-action-sigstore-python from 2.1.1 to 3.0.0 (#634)
• skip changelog(deps): bump actions/setup-python from 4 to 5 (#633)
• removed utils/check_backend_completeness.py (#628)

🚀 Performance improvements

• perf: optimizing arrow to_dummies (#627)

✨ Enhancements

• feat: add collect for dask (#651)
• feat: added dask Expr.__sub__ (#643)
• feat: add starts_with for dask (#648)
• feat: add is_between for dask (#642)
• feat: added dask Expr.__mul__ and test cases (#644)
• feat: add cum_sum for dask (#641)
• feat: add shift for Dask Dataframe (#638)
• feat: Add initial (and very minimal) support for Dask.DataFrame (#635)

🐞 Bug fixes

• fix: fix dask version in dask backend (#640)
• fix dask typo (#639)

🛠️ Other improvements

• chore: remove some pyarrow xfails from tests, further split up (#660)
• chore: enable more lazy tests (#658)
• chore: factor test_std outside test_common (#657)
• chore: enable more lazy tests (#656)
• chore: rename constructor -> constructor_eager, constructor_lazy -> constructor (#654)
• chore: factor test_schema and test_collect_schema out of test_common (#655)
• chore: More lazy vs eager separation (#653)
• chore: split eager-only and eager+lazy tests a bit (#652)
• chore: use constructor instead of constructor_series in tests more (#650)
• chore: replace constructor_series with constructor (#649)
• chore: replace constructor_with_series with constructor in gather_every_test (#646)
• ci: Add dependabot (#632)
• chore: allow unknown/extension namespaces for from_dict function (#626)

Thank you to all our contributors for making this release possible!
@DeaMariaLeon, @FBruzzesi, @MarcoGorelli, @aidoskanapyanov, @anopsy, @dependabot, @dependabot[bot], @montanarograziano and @ugohuche

Narwhals v1.1.7

Changes

✨ Enhancements

• feat: gather_every methods (#619)
• feat: raise informative error if getitem is used in unsupported manner (#624)
• feat: allow slicing by tuple of sequences of ints (#622)
• feat: arrow datetime namespace (#616)

📖 Documentation

• docs: replace df_any/s_any with df/s (#621)

🛠️ Other improvements

• chore: factor test_empty_select out of test_common (to existing select_test.py) (#617)
• ci: improve release process (#615)

Thank you to all our contributors for making this release possible!
@FBruzzesi, @MarcoGorelli, @aidoskanapyanov and @condekind

Narwhals v1.1.6

Changes

• cleaning: remove series.is_between from backend completness (#612)

🚀 Performance improvements

• perf: remove as_py from _arrow implementation wherever possible (#597)

✨ Enhancements

• feat : added arrow is_between and is_between_test.py (#609)
• feat: add schema argument to from_dict function (#606)
• feat: any_horizontal function (#605)
• feat: add from_dict (#602)
• feat: arrow namespace reduction functions (#601)
• feat: arrow quantile method (#600)
• feat: pyarrow dataframe iter_rows (#596)
• feat: Series.value_count spec enhancement (#583)
• feat: allow non-string columns names more for pandas (#595)
• feat: add nulls_last argument in Series/Expr.sort (#580)

🐞 Bug fixes

• fix: correct Polars version check for pl.len function (#607)

📖 Documentation

• docs: fix typo in README, update roadmap + related projects (#613)
• docs: document PyArrow as "full" support (#604)

🛠️ Other improvements

• chore: extend Implementation for all backends (#608)
• chore: remove some unnecessary flattens (#599)
• chore: reoder definitions in from_native (#598)

Thank you to all our contributors for making this release possible!
@FBruzzesi, @MarcoGorelli, @aidoskanapyanov and @anopsy

Narwhals v1.1.5

Changes

🚀 Performance improvements

• perf: fastpath for simple select in pandas-like (#587)

🛠️ Other improvements

• chore: factor drop_test out of test_common (#586)
• chore: factor concat_test out of test_common (#585)
• chore: factor item_test out of test_common (#584)
• ci: add polars specifier to ibis-framework dependency (#591)
• ci: fix hypothesis failure, remove ibis from tests (#592)

Thank you to all our contributors for making this release possible!
@MarcoGorelli and @aidoskanapyanov

Narwhals v1.1.4

Changes

• Add additional sponsors and institutional partners to README (#573)
• bug: fix Series.__getitem__ typing (#569)

✨ Enhancements

• feat: Series.to_dummies, arrow sort and unique (#577)
• feat: add arrow value_counts (#576)
• feat: add Series.drop nulls for pyarrow (#542)
• feat: pyarrow series descriptive methods (#570)
• feat: add DataFrame__contains__, Expr.arg_true, and Series.arg_true (#568)

📖 Documentation

• docs: api completeness (#530)

Thank you to all our contributors for making this release possible!
@EdAbati, @FBruzzesi, @InessaPawson, @MarcoGorelli, @anopsy and @mfonekpo

Narwhals v1.1.3

Changes

✨ Enhancements

• feat: Implement n_unique for pyarrow (#556)
• feat: ExprNameNamespace (#552)
• feat: arrow unique, is_duplicated, is_unique (#565)
• feat: implement truediv for pyarrow (#564)
• feat: add __floordiv__ and __rfloordiv__ for pyarrow (#544)
• feat: arrow selectors (#562)
• feat: arrow string namespace(s) (#551)
• feat: arrow join methods (#558)

📖 Documentation

• docs: docstrings narwhalify-cation (#559)
• docs: reword "related projects" section, remove all Ibis comparisons (#563)

🛠️ Other improvements

• chore: Factor out _polars from top-level Narwhals modules (i.e.: the mother of all refactors!) (#561)
• chore: rename internal extract_native function (#560)

Thank you to all our contributors for making this release possible!
@FBruzzesi, @MarcoGorelli, @lucianosrp and @mistShard

Narwhals v1.1.2

Changes

• added arrow is_in, changed the names of test folders (#545)

✨ Enhancements

• feat: arrow series sample (#550)
• feat: arrow series zip_with (#548)

📖 Documentation

• docs: add note about funding to readme (#554)
• docs: fix link for community cal (#553)

🛠️ Other improvements

• chore: refactor agg_arrow (#549)

Thank you to all our contributors for making this release possible!
@FBruzzesi, @MarcoGorelli and @anopsy

Narwhals v1.1.1

Changes

✨ Enhancements

• feat: allow nw.len in groupby for arrow (#540)
• feat: add len to pyarrow series and expr (#538)
• feat: ArrowExprCatNamespace (#536)
• feat: add is_null and __invert__ to pyarrow series (#534)
• enh: ruff S rule fix (#526)
• feat: implement Series.sum for pyarrow (#495)
• feat: pyarrow concat (#525)
• feat: pyarrow lit (#524)

📖 Documentation

• ci: fix exception in code snippet, add check to CI (#532)

🛠️ Other improvements

• ci: actually use pandas nightly in pandas-nightly build (#539)
• ci: remove [dev] from sklego install (#535)
• chore: ruff rules (#527)
• ci: add downstream tests for altair + scikit-lego (#533)
• ci: fix exception in code snippet, add check to CI (#532)
• test: conftest constructors refactoring (#515)

Thank you to all our contributors for making this release possible!
@FBruzzesi, @MarcoGorelli, @anopsy, @lucianosrp and @mfonekpo