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Properly documenting <code>ExprIR</code>

documentationImprovements or additions to documentationImprovements or additions to documentation

internal

Status: Open.

#3497 In narwhals-dev/narwhals;

· dangotbanned opened on Mar 3, 2026

[Doc]: Linting the example from the README gives an error when using <code>ty</code>.

documentationImprovements or additions to documentationImprovements or additions to documentation

typing

Status: Open.

#3493 In narwhals-dev/narwhals;

· thomascamminady opened on Mar 2, 2026

[Bug]: Typing--cannot chain function taking FrameT with nw.from_native()

Status: Open.

#3486 In narwhals-dev/narwhals;

· CangyuanLi opened on Feb 25, 2026

[Enh]: nw.Expr.struct.unnest

accepted

enhancementNew feature or requestNew feature or request

nested data`list`, `struct`, etc`list`, `struct`, etc

Status: Open.

#3476 In narwhals-dev/narwhals;

· benrutter opened on Feb 13, 2026

bug: duckdb <code>offset_by('1d')</code> adds 24 hours, rather than 1 calendar day

bug: incorrect resultSomething isn't workingSomething isn't working

duckdbIssue is related to duckdb backendIssue is related to duckdb backend

Status: Open.

#3465 In narwhals-dev/narwhals;

· MarcoGorelli opened on Feb 6, 2026

[Bug]: str.contains fails if passed Expr as match

bug: it raises an error but shouldn't

Status: Open.

#3459 In narwhals-dev/narwhals;

· liamholmes31 opened on Feb 5, 2026

[Enh]: Add support for pyspark interval data types

dtypes

enhancementNew feature or requestNew feature or request

spark-like

Status: Open.

#3431 In narwhals-dev/narwhals;

· FBruzzesi opened on Jan 31, 2026

Tracking: Adopt <code>ty</code> as an (additional) type checker

typing

upstream issue

Status: Open.

#3409 In narwhals-dev/narwhals;

· dangotbanned opened on Jan 21, 2026

[Enh]: Add support <code>{DataFrame, LazyFrame}.cast(...)</code>

accepted

enhancementNew feature or requestNew feature or request

Status: Open.

#3402 In narwhals-dev/narwhals;

· FBruzzesi opened on Jan 13, 2026

silence or override pandas warning about downcasting?

Status: Open.

#3394 In narwhals-dev/narwhals;

· MarcoGorelli opened on Jan 9, 2026

[Enh]: Add support for <code>concat(..., how={"vertical_relaxed", "diagonal_relaxed"})</code>

dtypes

enhancementNew feature or requestNew feature or request

Status: Open.

#3386 In narwhals-dev/narwhals;

· FBruzzesi opened on Jan 3, 2026

use protocols instead of optional 3rd party dependencies in public type annotations

typing

Status: Open.

#3374 In narwhals-dev/narwhals;

· MarcoGorelli opened on Dec 29, 2025