Difference in behavior of GenericMeta between 3.6.0 and 3.6.1

Sun Jul 16 09:29:22 EDT 2017

Oren Ben-Kiki wrote:
> TL;DR: We need improved documentation of the way meta-classes behave for
> generic classes, and possibly reconsider the way "__setattr__" and
> "__getattribute__" behave for such classes.

The typing module is marked as "provisional", so you probably have to live 
with the incompatibilities.
As to your other suggestions/questions, I'm not sure where the actual 
discussion is taking place -- roughly since the migration to github python-
dev and bugs.python.org are no longer very useful for outsiders to learn 
what's going on.
A random walk over the github site found
https://github.com/python/typing/issues/392
Maybe you can make sense of that? 
Personally, I'm not familiar with the evolving type system and still 
wondering whether I should neglect or reject...