Since my last post on the subject I have pretty much given up on PEP 649 in favor of what we have in 3.10alpha6 -- annotations are always stringified. The two problems brought up by Joseph Perez in particular seem too thorny to try and devise a solution for.

Jelle, could you explain why for your use cases PEP 649 is preferred over PEP 563?

On Sat, Mar 27, 2021 at 7:35 AM Jelle Zijlstra <jelle.zijlstra@gmail.com> wrote:
Hi Larry, I have the same question as Guido last month. I'd really like to see some version of PEP 649 go into 3.10; is there anything I can do to help? I opened https://github.com/larryhastings/co_annotations/issues/1 to discuss what seems to be the main problem identified in the previous discussion.

El jue, 4 feb 2021 a las 10:59, Guido van Rossum (<guido@python.org>) escribió:
Breaks are good. Looking forward to the next prototype!

On Thu, Feb 4, 2021 at 10:45 AM Larry Hastings <larry@hastings.org> wrote:


After working on it and stressing out about it for some months, I decided to take a break and scratch some other itches.  I'll return to PEP 649 soon, and I have every intention of having the PEP done and the prototype done well in advance of 3.10b1--worry not.

Thanks for checking in,


/arry

On 2/4/21 9:17 AM, Guido van Rossum wrote:
Hi Larry,

Can you give us a status update for your PEP 649? I don't recall reading anything about it in the past few weeks. I am super excited about this solution to the problem (even if there are a few issues to work through) and I think it will provide better backwards compatibility than the current plan for Python 3.10 (PEP 563, from __future__ import annotations, causing all annotations to be stringified).

If we don't get this into 3.10, we'd have a much more complicated transition. There are only two more alphas before 3.10b1 gets released! And we'd have to get this approved by the Steering Council, which can take a few weeks (cut them some slack, they have a big backlog). Fortunately you already have an implementation that can be landed quickly once the PEP is accepted.

--
--Guido van Rossum (python.org/~guido)


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--Guido van Rossum (python.org/~guido)
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--Guido van Rossum (python.org/~guido)
Pronouns: he/him (why is my pronoun here?)