Suppose that x is some list. To produce a version of the list with duplicate elements removed one could, I suppose, do this:
x = list(set(x)) but I expect that this will not preserve the original order of elements. I suppose that I could write something like def uniquify(items): seen = set() ret = [] for i in items: if not i in seen: ret.append(i) seen.add(i) return ret But this seems to me like such a commonly needed operation that I find it hard to believe one would need to resort to such self-rolled solutions. Isn't there some more standard (and hopefully more efficient, as in "C-coded"/built-in) approach? TIA! kynn -- http://mail.python.org/mailman/listinfo/python-list