Thanks Paul, but i don't immediately see how that helps (maybe I'm just being dense)... nn's solution, though i initially thought it worked, actually has a similar problem:
intended: >>> print getOutcomes([3,4,5,5]) [[6, 1, 5, 5], [4.5, 2.5, 5, 5], [3, 4, 5, 5], [1.5, 5.5, 5, 5], [0, 7, 5, 5]] >>> print getOutcomes([4,3,5,5]) [[7, 0, 5, 5], [5.5, 1.5, 5, 5], [4, 3, 5, 5], [2.5, 4.5, 5, 5], [1, 6, 5, 5]] nn's solution: >>> print getOutcomesNN([4,3,5,5]) [[6.0, 1.0, 5, 5], [4.5, 2.5, 5, 5], [3.0, 4.0, 5, 5], [1.5, 5.5, 5, 5], [0.0, 7.0, 5, 5]] it's obvious why this is happening (the list comprehension assumes that index 0 is, after all, index 0), but not immediately obvious how to fix it, except by going with gerard's solution or doing what i did in the beginning: flip them if they're in the wrong order, remember, and flip them again at the end. dmj -- http://mail.python.org/mailman/listinfo/python-list