From: "Guido van Rossum" <guido@python.org> > > I like the read-only dictionary better than the boolean test > > methods. It minimizes the effort in upgrading existing code of the > > form: > > > > for c in string.lowercase: > > do something > > if c in string.lowercase: > > do something > > > Maybe you can do a patch for isxxx() methods instead? Will do. Raymond Hettinger