Configurable should warn on unrecognized arguments

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#926 opened on Jun 4, 2025 5 comments 1 reaction 0 assignees View on GitHub

Description

Currently direct `HasTraits` subclasses warn when they receive unrecognized arguments:

https://github.com/ipython/traitlets/blob/b0eaa6aa77e198cff68644a388400db850670c7d/tests/test_traitlets.py#L2802-L2810

However, this does not work with `Configurable` and its subclasses, although it is a subclass of `HasTraits`:

https://github.com/ipython/traitlets/blob/b0eaa6aa77e198cff68644a388400db850670c7d/traitlets/config/configurable.py#L53

![Image](https://github.com/user-attachments/assets/eb8e93c2-1a71-4724-b384-a19344dfca0f)

### Context

This is implemented in:

https://github.com/ipython/traitlets/blob/b0eaa6aa77e198cff68644a388400db850670c7d/traitlets/traitlets.py#L1381-L1399

Related to https://github.com/ipython/traitlets/issues/145.

This issue has not been assessed yet.