[Python-Dev] type categories

[Guido van Rossum]

I think we may have retired the types-sig a week or two too
early... :-)

This kind of discussion is great for sharpening our intellect; the
types-sig had outbursts like this maybe twice a year.  But I have yet
to see something come out of it that was practical enough to be added
to Python "now".  Maybe Zope Interfaces are our best bet.  They surely
have been used and refined for almost four years now...

--Guido van Rossum (home page: http://www.python.org/~guido/)