Ipywidgets: reopen notebook ipywidget in jlab - Error creating widget: could not find model

[AbdealiJK]

I am using:

• JupyterLab v0.26.5
• @jupyter-widgets/[email protected]
• ipywidgets-7.0.0
• widgetsnbextension-3.0.0

I created a notebook with Jupyterlab and some ipywidgets - Textbox and int slider. When I close the notebook and reopen the notebook, the kernel is still attached but the widget has disappeared and instead shows:

Error creating widget: could not find model

In the notebook, when I close the notebook and reopen it the values in the Textbox and slider are persistent and do not get deleted. Here, to even see the widget again I have to re-run the cell

[jasongrout]

Thanks. We haven't implemented this yet for JupyterLab, so I'm setting this to the Future milestone.

[jasongrout]

(If you want to try contributing this, the code for the classic notebook extension to do this starts around https://github.com/jupyter-widgets/ipywidgets/blob/67af059687205f10a339472f72cd86d2b34948c2/widgetsnbextension/src/manager.js#L47

[spalato]

Same thing happens with plots opened using %matplotlib ipympl.

Current jupyter notebook displays a static image when opening a previous notebook.

[AbdealiJK]

Has there been any development on this?
I can see ipywidget 7.1.2 is out.

I would like to contribute but when I tried it I wasn't able to figure it out =(

[Alexboiboi]

Just tested jlab 1.0.0a3 and it seems that this problem has been resolved ;)
Thanks, great team

[jasongrout]

Thanks!