[WIP] Update to JupyterLab 3

[jrbourbeau]

cc @ian-r-rose

[ian-r-rose]

LGTM

[ian-r-rose]

Have you checked whether the workspace import still works? That format has historically not been especially stable

[jrbourbeau]

Checking now https://mybinder.org/v2/gh/jrbourbeau/dask-examples/jlab-3?urlpath=lab

[jrbourbeau]

Hmm it looks like the workspace import isn't working anymore. Were there changes on the JupyterLab side, or are the stability issues related to something else?

[ian-r-rose]

Probably a change in the JupyterLab side. There really isn't any guarantee of of compatibility for these files from version to version, since their primary intent is to store your ephemeral session state. If you're willing to wait a day or two on this (and the tutorials) PR, I could look into it.

[jrbourbeau]

That'd be great whenever you get a chance -- though no rush. Upgrading to JupyterLab 3 is nice to have but not critical

[jacobtomlinson]

The issue with workspaces should've been fixed in 3.1. I tried it out and it doesn't seem to be the case. I've tried generating a new workspace file just in case things changed from 2>3 so hopefully that will resolve it.

[jrbourbeau]

Thanks for the update @jacobtomlinson. Trying https://mybinder.org/v2/gh/jrbourbeau/dask-examples/jlab-3?urlpath=lab again with the updated workspace file didn't seem to do the trick either

@ian-r-rose any idea about what might be going wrong here?

[ian-r-rose]

Thanks for picking this back up again @jacobtomlinson . I'm looking into it. Funnily enough, JupyterLab has recently gained the ability to open workspace files by double-clicking them in the filebrowser, and that basically works. The import still seems to be causing problems, however :/

[ian-r-rose]

Update: workspace importing still seems pretty well broken (xref jupyterlab/jupyterlab#10805). I'll put a bug in Darian's ear about it

[jrbourbeau]

Closing in favor of #217