Yes, this is ready to bring before the SC.

On Tue, Oct 22, 2019 at 9:35 AM Ivan Levkivskyi <> wrote:
The mypy problem is just an implementation bug that should be fixed.

Otherwise, I think it is fine to move towards pronouncement. If the authors agree, IIUC the next step for them is to request Steering Council for a BDFL-Delegate, and then post the current PEP text for a review by the delegate.

Guido, is this right?


On Wed, 16 Oct 2019 at 22:52, Jakub Stasiak <> wrote:
Let me revive the thread.

As a way to verify the design and the implementation I added Annotated-based markers to Injector (I’ve done it quickly before, now I fully tested it and did it right). if anyone’s interested. I want to release it soon.

It was rather trivial, with the exception of testing if an object is an instance of Annotated – but once get_origin works with Annotated this won’t be an issue.

I wanted to test mypy integration and I found an issue with aliasing I think, reported here:

All in all the typing_extensions implementation seems to be working nicely and this PEP satisfies my needs so far.


--Guido van Rossum (
Pronouns: he/him (why is my pronoun here?)