I'd map the values to their index in a dictionary, then sort the list, and from the sorted list fetch all the indexes from the dictionary. Something like :
>>> a = [2,3,1,4,5] >>> b = list(a) >>> b.sort() >>> b [1, 2, 3, 4, 5] >>> indexDict = dict([ (value, index) for index, value in enumerate(a)]) >>> [indexDict[entry] for entry in b] [2, 0, 1, 3, 4] HTH The code above uses enumerate, to shortcut getting the index. There may be other shortcuts possible. Regards, Fuzzy http://www.voidspace.org.uk/python -- http://mail.python.org/mailman/listinfo/python-list
