I think most of this is covered by the python rule of thumb "explicit is better than implicit". I have a particularly stubborn cohort who loves nothing better than doing what I call "cargo trains" of combining list comprehensions and "." into sometime 7 or 8+ connected items in one liners. It is ridiculous. I have actually set calendar reminders to go ask him what these trains do after a couple of months between when he wrote the code and $TODAY. It never fails that he'll "get back with me". About an hour later I'll get an explanation via email :) . It never teaches him anything though.