narwhals 2.25.0

Narwhals v2.25.0

on Python PyPI

Changes

🚀 Performance improvements

• perf: remove redundant work in eager when/then, schema resolution, selectors, and module lookups (#3797)

✨ Enhancements

• feat: add str.strip_chars_{start,end} (#3843)
• feat: Add maintain_order argument to {Expr, Series}.list.unique (#3697)
• feat(typing): Introduce PluginName NewType so plugin backends can type check (#3794)
• feat(ibis): Add support for Expr.list.median for ibis backend (#3791)

🐞 Bug fixes

• fix: follow left-hand-index alignment rule for pandas-like concat (#3866)
• fix: null propagation for str boolean methods (#3865)
• fix: consistently place null's in with_row_index(order_by=...) (#3863)
• fix: honor schema column selection/order in pandas-like from_dicts (#3856)
• fix: use exact quantile for median on the pyarrow backend (#3855)
• fix: order Categorical columns by value in the pyarrow backend (#3862)
• fix: is_in was not preserving nulls where possible (#3859)
• fix: preserve nulls in pandas-like Expr.dt.ordinal_day (#3805)
• fix: resolve failing cross-references in documentation (#3790)

📖 Documentation

• docs: reorganise contributing.md and add useful make commands (#3836)
• fix: resolve failing cross-references in documentation (#3790)
• docs: Add Intella to "resources" (#3788)

🛠️ Other improvements

• ci: pin pandas in scikit-lego job to get ci green (#3860)
• chore: Bump pyrefly 1.2, remove some unnecessary pyrefly: ignores (#3848)
• chore: fix pandas nightly (#3849)
• chore: Remove pins in pyproject.toml, as dependencies are pinned in uv.lock anyway (#3847)
• chore: prek autoupdate (#3828)
• chore: add trailing-whitespace precommit (#3826)
• chore: Update uv lock, pre-commit hooks and fix linting issues (#3813)
• refactor: Dispatch IO functions via *Namespace methods (#3793)
• ci: fix lightgbm downstream test (#3801)
• chore: refactor compliant implementations to use expression_args instead of **expressifiable_args (#3766)
• chore: Small performance and robustness cleanups (#3798)
• chore: prek autoupdate (#3858)
• chore: prek autoupdate (#3846)
• ci: consolidate action updates in renovate and add zizmor pre-commit hook (#3835)
• test: split cat.get_categories tests for expr and series (#3814)

Thank you to all our contributors for making this release possible!
@aleks-drozy, @CangyuanLi, @EdAbati, @FBruzzesi, @ghostiee-11, @MarcoGorelli, @maxzw, @Shaan-alpha, @vidigoat and @github-actions[bot]