Here's a Python version I quickly threw together, for people like me who don't know Eiffel: https://gist.github.com/joelgrus/9dc47ebb22243fe990e5 https://gist.

Here's a Python version I quickly threw together, for people like me who don't know Eiffel: https://gist.github.com/joelgrus/9dc47ebb22243fe990e5 https://gist.github.com/joelgrus/9dc47ebb22243fe990e5 I think it's right. :)