On Wed, 2005-01-12 at 20:10 +0100, Bernhard Herzog wrote: > "It's me" <[EMAIL PROTECTED]> writes: > > > May be flatten should be build into the language somehow.... > > That shouldn't be necessary as it can easily be written in a single list > comprehension: > > a = [[1,2,4],4,5,[2,3]] > flat_a = [x for cur, rest in [[a[:1], a[1:]]] for x in cur > if (not isinstance(x, (list, tuple)) > and (not rest or not cur.append(rest.pop(0))) > or (x and (cur.append(x[0]) or rest.__setslice__(0, 0, > x[1:]))) > or (not x and rest and cur.append(rest.pop(0))))] > > ;-)
If it means I _never_ have to see that list comprehension again, then seeing 'flatten' go into itertools would make me very, very happy :-P -- Craig Ringer -- http://mail.python.org/mailman/listinfo/python-list
