[Types-sig] Module Attribute visibility

[Guido van Rossum]

> Why can't the runtime system violate the expectations? Seriously: I doubt
> you can prevent it. Python is simply too dynamic. I'd be surprised if you
> could completely stop me from changing sys.version if I want really trying
> to do so.

Nonsense.  You are confusing one particular implementation with what's
possible.  In JPython, things like this *are* being enforced in an
absolute way.  If that's what we want, we can do it.

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