Integration with JupyterLite?

[deeplook]

I think it would be nice to run ipylab in JupyterLite, so I gave it a try, although I see no claim that ipylab should support JupyterLite. So while ipylab does install fine, it does not appear to have any effect on the (JupyterLab) interface, like in this code:

import micropip
await micropip.install('ipylab')
from ipylab import JupyterFrontEnd

app = JupyterFrontEnd()
app.commands.execute('apputils:change-theme', {'theme': 'JupyterLab Dark'})

When using widgets in a panel like this (from a standard example snippet) I get a "Loding widget..." message:

import micropip
await micropip.install("ipylab")
await micropip.install("ipywidgets")
from ipylab import Panel
from ipywidgets import IntSlider

panel = Panel()
slider = IntSlider()
panel.children = [slider]
panel

I'd appreciate any statement if this should work and I'm doing something wrong, or if JupyterLite support is considered enough of a nice to have feature in the future?

[jtpio]

Thanks @deeplook.

Yes ipylab (latest versions) should work with JupyterLite now.

This is for example the case with this custom deployment: https://github.com/jtpio/lit

You might need to separate the following two statements in different cells:

app = JupyterFrontEnd()

app.commands.execute('apputils:change-theme', {'theme': 'JupyterLab Dark'})

[deeplook]

Ok, great! Will this be deployed to https://jupyterlite.readthedocs.io, too, and when? ;)

[jtpio]

Ah I think it's unlikely to be added to https://jupyterlite.readthedocs.io.

But you can easily make your own JupyterLite deployment and add ipylab to it (like https://github.com/jtpio/lit does).

[deeplook]

Sorry, I didn't mean "deployed" in the sense of pre-install ipylab on https://jupyterlite.readthedocs.io, but in the sense of being able to micropip-install it there.

[jtpio]

Right, it can be micropip installed. But the frontend extension also needs to be available, which requires adding it to the deployed website.

For example here on the demo site:

https://github.com/jupyterlite/jupyterlite/blob/21949bb8203cb4b18cc6c63cc25dd0a9cc2a45f0/examples/jupyter_lite_config.json#L4-L22

[deeplook]

Got it, thanks!