Refactoring: The _check_events() and _update_screen() methods
- refactoring simplifies code structure to make it easier to build on
- we’ll break the lengthy run-game() method into two helper methods
- helper method – does work inside a class but isn’t meant to be used by code outside the class
- a single leading underscore indicates a helper method
The _check_events() method
- we’ll move code that manages events to a separate method called _check_events()
- this simplifies run_game() and isolate the event management loop