Error when send_message is called without buffers

[davidbrochart]

Error when send_message is called without buffers

[davidbrochart]

Hi @ilyabo!

Do you think there is a chance of these changes being accepted into the default ipykernel?

I don't know ipykernel enough to know if it would be possible, and how hard, but akernel is definitely a project where we can experiment with this kind of new behaviors. If it solves real problems, or offer useful new features, sure we can think of contributing to the official Python kernel. Actually I'm happy that you tried it out, because I knew it could solve issues such as the one you are mentioning.

Thanks a lot @kylebarron for opening a PR, I need to polish akernel as up to now I was just trying to have something working, and was not expecting someone to use it, but very glad it happened! I'll be off for the next 5 days so don't expect any answer until then.

[kylebarron]

Note the error is actually from here: https://github.com/jupyter-widgets/ipywidgets/blob/4132414e5a4615a78cc6b849824a6df0155b26e9/ipywidgets/widgets/widget.py#L516-L526

widgets.send defaults buffers to None.