As noted in #539 - moves justification for using JupyterLab and an explanation of alternative methods of running python scripts to the start of the lesson
This is exactly the sort of clarification I was thinking of! Thanks very much @harryjmoss for your effort in making these changes and @alee for taking the time to review.
As noted in #539 - moves justification for using JupyterLab and an explanation of alternative methods of running python scripts to the start of the lesson