As is, it does absolutely nothing. It is a type annotation for the main function that simply states that this function returns none. Type annotations were introduced in python 3. 5 and are specified in pep 484.

What would you expect it to look like on the calling end? You can't write a = select_choice(); B = select_choice() because that … What is the main difference between class and def in python? Can a class in python interact with django ui (buttons)?

Can a class in python interact with django ui (buttons)?