Good post. I especially like the walrus operator, which, as far as I understand, improves readability and promotes brevity. About positional args, though, if it has been introduced only recently, how does the doc in this reference: <a href="https://www.python.org/dev/peps/pep-0570/#numpy-ufuncs" rel="nofollow">https://www.python.org/dev/peps/pep-0570/#numpy-ufuncs</a> use them already?