narwhals 1.29.0

Narwhals v1.29.0

on Python PyPI

Changes

• test: enhance xfail markers with specific reasons in timestamp_test.py (#2065)
• refactor: Generic CompliantSelector (#2064)
• docs: more concise docstrings(#2068) (#2117)
• chore: deprecate LazyFrame.gather_every in main namespace (but maintain it in stable.v1) (#2103)
• test(typing): fix DataFrame.sort_values overload match (#2109)

🚀 Performance improvements

• perf: Avoid redefining lambda in *Namespace.all (#2102)
• perf: avoid full broadcast for otherwise_value in when/then/otherwise (#2098)
• perf: use cached property for schema/columns lazy frames (#2093)
• perf: only validate duplicate column names when collecting for duckdb/pyspark/dask (#2092)

✨ Enhancements

• feat: Adds nw.exclude (#2122)
• feat: Add support for pandas-like .diff().over(group) (#2128)
• fill_null with expression (#2106)
• feat: Adds DataFrame.iter_columns (#2104)
• feat: str.split (#1932) (#2054)
• feat(typing): Backport generic Series to v1 (#2110)
• feat: align over signature with Polars (#2096)
• chore: Finalize support for SQLFrame (#2038)

🐞 Bug fixes

• fix(typing): Include Expr in fill_null signature (#2129)
• fix: Allow exprs in .filter constraints (#2114)
• fix: pyspark unpivot with index None (#2090)

📖 Documentation

• docs: Add API example docs for Field dtype (#2131)
• docs: add Implementation page (#2107)
• docs: concise_docstrings (#2068) (#2086)

🛠️ Other improvements

• refactor: Simplify ArrowGroupBy.__iter__ (#2133)
• chore: simplify pandas-like over (#2127)
• chore(typing): Generic CompliantDataFrame (#2115)
• chore(typing): enable typing checks for pyspark (#2051)
• chore(typing): remove unused, ignored TypeVar (#2108)
• chore(typing): fix group_by (#2105)
• perf: Avoid redefining lambda in *Namespace.all (#2102)
• chore: rename changes_length to filtration (#2094)
• chore: add has_open_windows to ExprMetadata instead of is_order_dependent (#2078)
• chore(typing): Resolve _dask errors (#2087)
• refactor(typing): Use a forward ref for IntoCompliantExpr (#2088)
• chore(typing): Fix (Pandas|Arrow)(When|Then) (#2089)
• refactor(ruff): enable some preview rules (#2042)

Thank you to all our contributors for making this release possible!
@EdAbati, @FBruzzesi, @MarcoGorelli, @dangotbanned, @janpipek, @luke396, @skritsotalakis and @thomasjpfan