Not in response to any particular note, but to the thread as a whole. Regarding how beginners make tweaks and changes at random, hoping that the bug will disappear, where experts tend to be a bit more methodical in their bug-fixing.
Here at academia I have taught a little bit of partial correctness, using assertions and what-not to determine whether the code is correct using mathematical proof techniques. And then I would ask a test question for them to apply those proof techniques to a perfectly good function, which contains no errors of any kind. And invariably I get those answers that randomly perturb the code instead. Roger Christman Pennsylvania State University -- https://mail.python.org/mailman/listinfo/python-list
