Thanks everyone, things to chew on. I'll look at the other itertools functions mentioned. I did solve Proj. Euler 15 & 18 (and it's corresponding 67), one more elegantly than the other, and I have given some thought to how to break this one down, but haven't figured it out yet. I think I might not be willing to wait a trillion years. I think I'm going to stop development on this approach, both 1) because I don't think it's going to work, and 2) because I might have learned most of what I can from it, re: Python skills.
I am quite interested in the dynamic programming approach, which I understand my approach to PE 18 was consistent with, but which I don't yet understand how to apply more broadly or consistently. I'll do some reading on it. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor