Ask HN: Multiple people working in Python notebooks?

I was part of a very cool data for good project this past weekend where hundreds of volunteers worked on visualizations and analyzing open data around specific questions.

This also meant everyone using their own Python notebooks, pushing their ETL and visualization code to Github, and then dropping a picture of the visualization output into a Goole doc or the shared Slack channel for everyone to see..

Is there a better way to handle this?