Narwhals

Changes

- bug: fix pyarrow `to_date` (1216)
- simplify marimo in downstream_tests.yml (1214)
- Simplify return function in `_pandas_like.utils.py` (1204)

🚀 Performance improvements

- perf: move `maybe_evaluate_expr` out of for loop in `reuse_series_implementation` (1217)

✨ Enhancements

- feat: add is_into_series (1215)
- enh: add dt.timestamp (1220)
- feat: add to_py_scalar (1194)

🐞 Bug fixes

- fix: flaky test on polars==0.20.30 (1231)
- fix: Add df`.rows(named=False)` support for cuDF data frames (1186)

📖 Documentation

- docs: Pyarrow example docstrings for `Expr` and stable v1 API (1218)
- doc: add note about cuDF tests in contributing guide (1227)
- docs: update installation.md (1221)
- docs: move index to start of API reference (1213)
- doc: Add uv to quick start (1169)
- docs: Add Pyarrow example to Expr.mean (1207)
- docs: add 'commotion' to Zen (1208)

🛠️ Other improvements

- chore: refactor `compare_dicts` (1224)
- chore: series and expr namespaces typing with generics (1232)
- chore: nox doctests only in Python 3.12 (1222)
- chore: use constructors (1210)
- test: xfail iter_rows tests for cudf (1209)
- chore: tests cleanup and add `from __future__ import annotations` (1206)

Thank you to all our contributors for making this release possible!
CarloLepelaars, DeaMariaLeon, EdAbati, FBruzzesi, LiamConnors, MarcoGorelli, artiom-matvei, luke396, mscolnick, raisadz and schloerke

Changes

✨ Enhancements

- feat: add from_arrow (which uses the PyCapsule Interface) (1181)
- feat: Add 'IntoSeries' (991)
- feat: add ConstructorEager type (1091)
- feat: Adding allow inspecting inner fields of nw.Struct (1192)
- feat: add The Zen of Narwhals (1168)
- feat: add `<min|max>_horizontal` (1148)

🐞 Bug fixes

- fix: add `__native_namespace__` for interchange support dataframes (1172)

📖 Documentation

- docs: Update CONTRIBUTING.md with Python 3.12 (1197)

🛠️ Other improvements

- test: update cuDF tests (1196)
- ci: only check doctests on Python3.12 (1189)
- ci: add downstream tests for `marimo` (1166)
- chore: Delete tpch/notebooks directory (1180)
- test: unxfail test_unary for dask (1174)
- ci: try fixup bump-version.yml (1171)
- ci: bump version workflow (1063)
- chore: Use shiny's Makefile to allow for test commands to change over time (1161)

Thank you to all our contributors for making this release possible!
AlessandroMiola, ChinoUkaegbu, DeaMariaLeon, FBruzzesi, LiamConnors, MarcoGorelli, dependabot, dependabot[bot], lucianosrp, luke396, raisadz and schloerke

Changes

✨ Enhancements

- enh: Add `.rows(named=False)` support for pyarrow (1155)

🐞 Bug fixes

- fix: make Series.scatter always return new series (1159)

📖 Documentation

- docs: Used by marimo (1162)
- docs: separate out DataFrame and LazyFrame in api-completeness (1157)

Thank you to all our contributors for making this release possible!
AlessandroMiola, Cheukting, MarcoGorelli, akshayka and schloerke

Changes

🚀 Performance improvements

- perf: Impove `pandas`-backend indexing (993)

✨ Enhancements

- feat: add dt.replace_time_zone (1142)
- feat: allow `format=None` in `str.to_datetime` (1145)
- feat: `concat_str` (1128)
- feat: allow inspecting the inner type / length of nw.Array (1136)

🐞 Bug fixes

- fix: when-then-otherwise lit string for arrow backend (1137)
- fix: pyarrow unpivot upcast numeric (1140)
- fix: update no_agg to work with cuDF (1138)
- fix: fixing unnesscary raise of mean_horizontal (1082)

📖 Documentation

- docs: apply further changes to api reference (1150)
- docs: add missing methods in api reference (1144)
- docs: add missing Series str methods in api reference (1143)
- docs: fix small docs typo (1141)

🛠️ Other improvements

- test: xfail test_unpivot_mixed_types for cuDF (1153)

Thank you to all our contributors for making this release possible!
AlessandroMiola, Cheukting, DeaMariaLeon, FBruzzesi, LiamConnors, MarcoGorelli, aivanoved, pre-commit-ci and pre-commit-ci[bot]

Changes

✨ Enhancements

- feat: `Series.str.to_datetime` (1131)
- feat: make typing available under narwhals.stable.v1 (1130)
- feat: add `nulls_last` kw in dataframe sort (1124)

🐞 Bug fixes

- fix: Fix `DataFrame.__getitem__` when slicing with tuple and null slice (1123)

📖 Documentation

- docs: add Ibis to "related projects" (1126)
- docs: correct python bytes description (1115)
- docs: fix some docs issues (1114)
- docs: assorted docs updates (1109)

🛠️ Other improvements

- ci: add py-shiny to downstream tests (1132)
- test: xfail test_actual_object for cuDF (1129)
- test: xfail tz_aware test for cuDF (1118)
- test: xfail empty string test in `test_unpivot` (1113)

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

Changes

- ci: add name-tests-test to pre-commit (1093)

✨ Enhancements

- feat: allow inspecting the inner type of List (1104)
- feat: add `maybe_reset_index` for pandas-like dataframe or series (1095)
- feat: `Datetime(time_unit, time_zone)` and `Duration(time_unit)` types (960)
- feat: add dtypes to stable api (1087)

🐞 Bug fixes

- fix: Specialize typing in `dataframe` between `Frame` and `DataFrame` (1030)
- fix: `PandasLikeSeries.zip_with` scalar value and `DaskNamespace.when` (1099)
- fix: `drop_nulls` with subset of length>1 (1090)
- fix: make `narwhalify` part of stable api (1086)

📖 Documentation

- doc: add pyarrow to DataFrame docstring (1097)
- docs: Added new logo (1085)
- docs: add pyarrow to dataframe lazy docstring (1055)

🛠️ Other improvements

- chore: Refactor validate_column_comparand (1102)
- test: xfail __iter___test for cuDF (1106)
- test: update check for cuDF series (1105)
- test: allow cuDF series in compare_dicts (1100)
- test: `xfail` test using None on `to_numpy` for cuDF (1092)
- chore: rename translate_dtype to native_to_narwhals_dtype (1089)

Thank you to all our contributors for making this release possible!
DeaMariaLeon, FBruzzesi, LiamConnors, MarcoGorelli, V-Alizade, luke396 and raisadz