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with mypy ≥ 1.18 some mytype errors appear

bug

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

good first issue

has-reproIssues with a Minimal, Reproducible ExampleIssues with a Minimal, Reproducible Example

help wanted

typingRelated to static typing/type hintsRelated to static typing/type hints

Status: Open.

#3962 In vega/altair;

· mattijn opened on Feb 21, 2026

with pandas-stubs ≥ 2.3.3 some mytype errors appear

bug

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

good first issue

has-reproIssues with a Minimal, Reproducible ExampleIssues with a Minimal, Reproducible Example

help wanted

maintenance

typingRelated to static typing/type hintsRelated to static typing/type hints

Status: Open.

#3961 In vega/altair;

· mattijn opened on Feb 21, 2026

Narwhals typing breakage after lock file update (narwhals 2.2 / 2.9)

bug

typingRelated to static typing/type hintsRelated to static typing/type hints

Status: Open.

#3960 In vega/altair;

· mattijn opened on Feb 21, 2026

Error when concatenating interactive faceted charts

bug

needs-triageBug report needs maintainer responseBug report needs maintainer response

Status: Open.

#3954 In vega/altair;

· lbittarello opened on Feb 11, 2026

Help needed: fixing non-standard <code>resource.path</code> in vega-datasets

enhancement

Status: Open.

#3946 In vega/altair;

· dsmedia opened on Feb 2, 2026

[BUG] anywidget.js 404 Not Found when rendering Altair charts #333

bug

needs-triageBug report needs maintainer responseBug report needs maintainer response

Status: Open.

#3935 In vega/altair;

· jeeenolee93-byte opened on Jan 6, 2026

Can we reduce the number of false-positives of the <code>user warning: automatically deduplicated selection parameter</code>

bug

needs-triageBug report needs maintainer responseBug report needs maintainer response

Status: Open.

#3916 In vega/altair;

· mattijn opened on Nov 12, 2025

inline marimo WASM notebooks for interactive examples

enhancement

Status: Open.

#3915 In vega/altair;

· koaning opened on Nov 12, 2025

issues with sync_website

bug

needs-triageBug report needs maintainer responseBug report needs maintainer response

Status: Open.

#3914 In vega/altair;

· mattijn opened on Nov 12, 2025

improve tests for python 3.14

enhancement

Status: Open.

#3906 In vega/altair;

· mattijn opened on Nov 6, 2025

<code>value</code> of <code>selection_interval</code> should be list, not tuple

bug

needs-triageBug report needs maintainer responseBug report needs maintainer response

Status: Open.

#3896 In vega/altair;

· rambip opened on Oct 25, 2025

Allow to layer simple faceted charts

enhancement

Status: Open.

#3883 In vega/altair;

· thomascamminady opened on Oct 10, 2025