[NERSC] Test and Deploy a JupyterHub kernel that reliably can use ipympl + afwdisplay

[wmwv]

Description
I would like to be able to support interactive image viewing using the lsst.afw.display Science Pipelines functionality with an ipympl backend.

Choose all applicable topics by placing an 'X' between the [ ]:

• jupyter
• Cori interactive command line
• Batch jobs
• python
• CSCRATCH
• Community File System
• HPSS (tape)
• Data transfer and Globus
• New User Account or account access problems

To Reproduce
Steps to reproduce the behavior:

1. Check out on NERSC
   git clone https://github.com/lsst/display_matplotlib
2. Log in to NERSC Jupyter Hub
3. Open the examples/display_matplotlib.ipynb Notebook in the display_matplotlib directory checked out above.
4. Select desc-stack kernel.
5. Run Cells.
   One should see the random image created in the previous cell.

Instead I get the following error message

Error displaying widget: model not found

[wmwv]

The following matplotlib issue may be relevant:

matplotlib/ipympl#112

[heather999]

Started to take a look at this. I see that NERSC's jupyter environment already includes the @jupyter-widgets/jupyterlab-manager and jupyter-matplotlib extensions. I do see that ipympl in desc-stack is an older release, I'll try updating and see if that helps.

[heather999]

Upgrading ipympl seems to have fixed it. @wmwv Can you try desc-stack-dev with the display_matplotlib.ipynb and see that things generally run? I see just one error message The module://ipympl.backend_nbagg matplotlib backend doesn't support display._getEvent() but the plots seem to come up.
If it looks good, I'll promote this to prod and desc-stack will be properly updated.

[wmwv]

Yes, desc-stack-dev works. Thank you!

[heather999]

Sorry for the delay, desc-stack has just been updated. Closing this issue, but if any problems come up, feel free to re-open or start a new issue.