vbarbaresi

I will, it's a recursive Python script actually. I think the algorithm is suboptimal and a bit messy, I'll share as soon as I rewrite it.

(original poster here) I figured that someone might have already done it, but I didn't find these. It's surprising because I wrote an extremely similar README file!

However it looks like he wrote the solution manually, whereas I couldn't as it's way too complicated with Paris' metro system. I wrote a small algorithm (using Python) to create the graph. I'll probably publish it, after I clean the code a little.