Narwhals

Changes

🚀 Performance improvements

- perf: make to_py_scalar 3x faster when argument is str (1276)

✨ Enhancements

- feat: support `columns` and `select` for InterchangeFrame if `_df` is present (1283)
- RFC, feat: infer datetime format for pyarrow backend (1195)
- feat: add is_pandas_index, is_modin_index, is_cudf_index, is_pandas_like_index utility functions (1272)
- err: replace msg = "Please set allow_series=True" with msg = "Please set allow_series=True or series_only=True" (1280)

🐞 Bug fixes

- fix: `from_native` was sometimes raising unnecessarily with `strict=False` (1274)

📖 Documentation

- docs: Render table of contents members ordered & removed css reference (1275)

🛠️ Other improvements

- chore: Simplify stable api docstrings (1278)
- ci: test with python3.13 (1094)

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

Changes

✨ Enhancements

- feat: add `.select` (by str) for duckdb and ibis backend (1266)
- feat: better error message for duplicate column names in pandas (1270)
- feat: expose `generate_temporary_column_name` (1264)

🐞 Bug fixes

- fix: remove _dtype_cache for pandas-like so that inplace modification… (1268)
- fix: Cudf groupby iter (1265)

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

Changes

🚀 Performance improvements

- perf: improve performance of Series.dtype and DataFrame.schema for pandas-like (1255)
- perf: avoid redundant copies when resetting index for pandas (1252)
- perf: always use copy=False when doing rename for pandas (1247)
- perf: pandas-like fastpath in maybe_reset_index (1246)

✨ Enhancements

- feat: Add total seconds implementation for cuDF (1188)
- feat: add drop_null_keys argument to group_by (1257)

📖 Documentation

- docs: add duckdb to docs (1261)
- docs: fix parameters table rendering in `quantile` docs (1251)
- docs: zen dedicated doc page (1243)
- docs: Wimsey added to project list in Readme (1242)
- docs: DataFrame conversion tutorial (1240)

🛠️ Other improvements

- test: xfail cudf failures (1259)
- test: get groupby tests passing for pandas 1.0.x (1253)
- test: update cudf xfails based on latest version (1250)
- test: only test dask with partitions=2 for now (1248)
- ci: add tubular in ci checks (1211)
- chore: make module versions as constants for use in tests (1235)

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

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