...in Python. Please don't. Use proper functional language to learn this paradigm, otherwise you won't see the difference between imperative and functional pro

...in Python. Please don't. Use proper functional language to learn this paradigm, otherwise you won't see the difference between imperative and functional programming. Especially that the presented "functional version" of the code is inconvenient to use compared to the one with mutable state. Python was not written with that in mind, so it's not a good fit.