Message 391935 - Python tracker

> Could you please land the new flag and typeobject.c code now?

I've only got two more questions before I mark it ready for review, and that's regarding Guido's comment in msg391756:
Should the new flag also take care of __class__ assignment, or should we leave that out?
Are there other places where !Py_TPFLAGS_HEAPTYPE is used where we would like to use the immutable flag?

> I'm happy to take care of "my" code myself.

No problem, I'll leave it out of the patch :)