Hi all,
you have an excellent course for beginners. I have been inspired by it and created also my own course but C++ based (discussed with vepadulano in past).
May I also propose a simple physics decay https://github.com/aprozo/jpsi/blob/main/invariantMass.ipynb which is done using looping over TTree?
I think this tutorial (which also includes how to treat statistics) would be valuable for applying ROOT to closer-to-reality analysis in HEP.
With best wishes, Sasha