Drop notebook 6

[marthacryan]

Note: this PR is on top of the changes from #4823 because the plotly.js version used in plotly.py is based on the jupyterlab extension code, and we needed a new place to store the plotly.js version. The widget seemed like a good place because all of the other javascript is removed in this PR.

Fixes #4779.

It appears that the entire packages/javascript/jupyterlab_plotly directory contains code that is either used to support very old versions of jupyter lab/notebook/voila, or is not used at all. This PR removes the entire directory in favor of having a very small packages/python/plotly/js directory that contains only the widget code (see #4663 for adding the widget code into that directory).

The last time that the jupyter extension was significantly changed was 3 years ago in #3142. @fcollonval described the files in the packages/javascript/jupyterlab_plotly directory in this comment. He did add support for federated extensions (new jupyter lab/notebook build), but I wasn't able to find evidence that having an extension installed in jupyterlab >=3 or jupyter notebook >= 7 is even necessary for plotly. @fcollonval if you know of any reason that that isn't true, please let me know!

To test:

• Checkout branch
• Create a new python env (conda, mamba, pipenv, etc)
• git clean -f -x -d
• cd packages/python/plotly
• pip install -e .
• pip install jupyter
• Try it out in jupyter lab: jupyter lab
• Try it out in jupyter notebook: jupyter notebook

[fcollonval]

I wasn't able to find evidence that having an extension installed in jupyterlab >=3 or jupyter notebook >= 7 is even necessary for plotly

This is correct because the produced output is using html that will includes plotly.js the first time:

plotly.py/packages/python/plotly/plotly/io/_base_renderers.py

Line 368 in 7bcbb20

class NotebookRenderer(HtmlRenderer):

Dropping the mimerenderer factory will prevent plotly.json file to be opened in JupyterLab.

[marthacryan]

@fcollonval Thank you for the response! Also hi!

[archmoj]

This is looking good to me.
@marthacryan Would you please add a changelog entry?

[LiamConnors]

@marthacryan, testing the FigureWidget in Notebook 7 and I get a JavaScript error:

Code is

import plotly.graph_objects as go

f = go.FigureWidget()
f

I have anywidget=0.9.13

[marthacryan]

@LiamConnors Looks like this wasn't happening for me because I hadn't added the npm install && npm run build step into pip install -e ., so the necessary javascript wasn't generated! I'll look into adding that

[LiamConnors]

In VS Code, I see this:

Not really sure what to make of it. I'm using the same environment as in a notebook launched in the browser.

I've commented here as I'm testing off this branch, but I guess this may be more related to #4823

[LiamConnors]

The section above this talks about "JupyterLab Support" and should now mention anywidget. Wondering if this section should stay as "Jupyter Notebook Support"