Since you mentioned the visualization part, let me comment on my pet pieve:
The rainbow / jet color map should not be used for anything. It distorts your data and is not accessible for people with color vision deficiencies.
If you want to know more, have a look here: https://matplotlib.org/stable/users/explain/colors/colormaps... and this talk here: https://youtu.be/xAoljeRJ3lU