Quoth Tim Rowe: [...] > - Anton's solution barfs on R = [x*y for x,y in zip(R[::2],R[1::2])], > complaining that the sequence index must be an integer. Try it on Python 2.3, where extended slice notation actually works for lists. -- Steven Taschuk staschuk at telusplanet.net "Telekinesis would be worth patenting." -- James Gleick