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 ...

Nearly all command line Python programs use argparse to simplify picking options and arguments off the command line as well as providing some help. The Gooey decorator picks up all your options ...