Decorators in Python are a prime-time example of a perfectly implemented feature. It does take a while to wrap your head around, but it’s worth it.

$ python decorator_test.py Function calculate_squares being called at 2018-08-23 12:39:02.112904 Took 2. ... Another common use case of decorators is to validate function arguments and return ...

The Gooey decorator picks up all your options and arguments and creates a GUI for it. You can make it more complicated if you want to change specific things, but if you are happy with the defaults ...