meridian wrote: > If, like me, you're always forgetting which way around your list/seq > slices need to go then worry no more. Just put my handy "slice > lookupper" (TM) ) on a (large!) PostIt beside your screen and, Hey > Presto! no more tediously typing a 1-9 seq into your interpreter and > then getting a slice just to check what you get.. (Yes you. You know > you do that !) ... Cheers Steve
Actually, I don't. I just remember that, for a natural (positive nonzero) number y: x[:y] is the first y elements x[-y:] is the last y elements As shown here: >>> x = range(5) >>> x [0, 1, 2, 3, 4] >>> x[:2] [0, 1] >>> x[-2:] [3, 4] >>> And I just work it out from there. Just my method for remembering slices, that happens to work pretty well for me. > x = '0123456789' > > x[-10: ] 0123456789 x[ 0: ] > x[ -9: ] 123456789 x[ 1: ] > x[ -8: ] 23456789 x[ 2: ] > x[ -7: ] 3456789 x[ 3: ] > x[ -6: ] 456789 x[ 4: ] > x[ -5: ] 56789 x[ 5: ] > x[ -4: ] 6789 x[ 6: ] > x[ -3: ] 789 x[ 7: ] > x[ -2: ] 89 x[ 8: ] > x[ -1: ] 9 x[ 9: ] > > x[ :-9 ] 0 x[ :1 ] > x[ :-8 ] 01 x[ :2 ] > x[ :-7 ] 012 x[ :3 ] > x[ :-6 ] 0123 x[ :4 ] > x[ :-5 ] 01234 x[ :5 ] > x[ :-4 ] 012345 x[ :6 ] > x[ :-3 ] 0123456 x[ :7 ] > x[ :-2 ] 01234567 x[ :8 ] > x[ :-1 ] 012345678 x[ :9 ] > 0123456789 x[ :10 ] -- http://mail.python.org/mailman/listinfo/python-list
