So sad that github diff doesn't work with this PR 😭 I'll just leave comments on what I find here because I basically can't leave comments in the diff.

• README.md could include a link to the plotly-geo repo since that has its own section there. Just in case people want to make issues or even just to track down where it is.
• Looks like the .gitignore needs to be updated - specifically:

packages/javascript/jupyterlab-plotly/lib/
plotly/jupyterlab_plotly/labextension/
plotly/jupyterlab_plotly/nbextension/index.js*

• I feel like we should remove the whole section on tox in the CONTRIBUTING.md but that's for a different PR

Overall, I think this is ready to merge even if there will be some finishing touches afterward.

@emilykl would you like to push the big green button or shall I?

@gvwilson I'll make the changes Martha suggested and then merge!

The make file for the API reference docs needs an update for the new structure:
https://github.com/plotly/plotly.py/blob/simplify-dir-structure/doc/apidoc/Makefile
It still references packages/python...

Thanks @LiamConnors , good catch.

I've updated the paths -- how would you recommend I verify that the Makefile is correct now?

Thanks @LiamConnors , good catch.

I've updated the paths -- how would you recommend I verify that the Makefile is correct now?

If you install the requirements.txt in doc and then go to doc/apidoc, running make html should generate the output.
I've tested it with these changes and the API docs build correctly.