Anton Vredegoor wrote: > I have subclassed the builtin list type to accept tuples for indexing. ...apparently to deal with nested lists, if I read you right. I don't like that; I've long thought that L[seq] should be [L[x] for x in seq], and L[seq]=seq1 should be like for i, v in zip(seq, seq1): L]i] = v with the added constraint that len(seq) == len(seq1). Alex