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[Enh]: have a constructor in Narwhals so that its testing suite can be used in plugins and other extensions

Status: Open.

#3232 In narwhals-dev/narwhals;

· ym-pett opened on Oct 22, 2025

<code>AttributeError: 'Series' object has no attribute 'array'</code> for cuDF

bug: it raises an error but shouldn't

Status: Open.

#3231 In narwhals-dev/narwhals;

· MarcoGorelli opened on Oct 22, 2025

<code>from_native(nw.LazyFrame, eager_only=True)</code> returns <code>nw.LazyFrame</code>

bug: it should raise an error but doesn't

Status: Open.

#3226 In narwhals-dev/narwhals;

· dangotbanned opened on Oct 20, 2025

tests: Move from <code>assert_equal_data</code> to <code>assert_frame_equal</code>

blocked

help wantedExtra attention is neededExtra attention is needed

tests

Status: Open.

#3221 In narwhals-dev/narwhals;

· FBruzzesi opened on Oct 18, 2025

api: move <code>filter</code> from <code>CompliantSeries</code> to <code>CompliantExpr</code>

Status: Open.

#3216 In narwhals-dev/narwhals;

· MarcoGorelli opened on Oct 17, 2025

<code>nw.DType</code>, <code>pl.DataType</code> feature parity

dtypes

enhancementNew feature or requestNew feature or request

Status: Open.

#3214 In narwhals-dev/narwhals;

· dangotbanned opened on Oct 16, 2025

Improve <code>DType.__repr__</code> and simplify <code>__slots__</code> maintenance via metaclasses

dtypes

Status: Open.

#3212 In narwhals-dev/narwhals;

· FBruzzesi opened on Oct 15, 2025

[Enh]: Track backend between lazy-&gt;collect-&gt;lazy

enhancementNew feature or requestNew feature or request

Status: Open.

#3210 In narwhals-dev/narwhals;

· jrothbaum opened on Oct 14, 2025

enh: replace_strict with default values

enhancementNew feature or requestNew feature or request

Status: Open.

#3209 In narwhals-dev/narwhals;

· MarcoGorelli opened on Oct 14, 2025

Drop support for Python <code>3.9</code>

dependenciesPull requests that update a dependency filePull requests that update a dependency file

Status: Open.

#3204 In narwhals-dev/narwhals;

· dangotbanned opened on Oct 13, 2025

ensure we don't raise in any <code>*.native_to_narwhals_dtype</code>

dtypes

error reporting

tests

Status: Open.

#3197 In narwhals-dev/narwhals;

· dangotbanned opened on Oct 11, 2025

Simplify compliant <code>concat_str</code>'s

internal

needs investigation

Status: Open.

#3196 In narwhals-dev/narwhals;

· FBruzzesi opened on Oct 11, 2025