No worries, my Java looks very Smalltalk-ish. I code in Smalltalk regardless of which programming language I am coding in. It would be great to see an alt Python version if you're up for it. I have to admit to not fully getting the hang of list comprehensions in Python yet. I'd be happy to learn from a better version of this example. That's kind of the point of why I did this. I wanted to learn some basic Python. It felt satisfying to get unit tests passing in Python.