> Patch #552433: Special-case tuples. Avoid sub-type checking for lists. > Avoid checks for negative indices and duplicate checks for support of > the sequence protocol. I've missed the review of this patch. Why bother special-casing tuples? Who's ever going to iterate over a tuple long enough that it makes a difference? --Guido van Rossum (home page: http://www.python.org/~guido/)