[Python-3000] Making more effective use of slice objects in Py3k

[Fredrik Lundh]

tjreedy wrote:

> These two similar features would be enough, to me, to make Py3 more than 
> just 2.x with cruft removed.

well, it's really only C API issues that keeps us from implementing this 
in 2.x... (too much code uses PyString_Check and/or PyUnicode_Check and 
then happily digs into the associated buffers).

</F>