Passing wrong types to vectors(colors=...) hides the plot with hard to see error

[martinal]

I tried passing colors=... in the K3D.vectors(...) call in vector_animation_k3d.ipynb.

It took a few tries before arriving at this format

colors = np.zeros(z.shape + (2,), dtype='uint32')

although I did understand it quickly after I spotted the error message.

It's somewhat unconventional to show errors with overlays in the corner of a notebook and require looking at the browser console. Would you consider displaying the error in the output field? Also I believe this kind of dimension mismatch could be caught in the factory functions on the python side instead of going all the way to javascript.

This also highlights the need for documentation.

[artur-trzesiok]

Whole validation will be refactored. @tgandor is resposible for this. This error should be caught on python level. Error on js level is not a option in world of ipywidgets - that error are only for development purpose

[martinal]

👍