Mailing List Archive: SC Acceptance: PEP 646 -- Variadic Generics

SC Acceptance: PEP 646 -- Variadic Generics

Nov 17, 2021, 2:47 PM

Post #1 of 4 (309 views)

Hello Mark, Matthew, Pradeep, Vincent, and Guido,

The Python Steering Council discussed the latest version of PEP 646 (Variadic Generics) at our last meeting, and have unanimously decided to accept the PEP. Congratulations!

We want to specifically mention that we appreciate the way you called out the Python grammar changes required by the typing features you proposed. As we’ve said before, the Steering Council strongly believes that the typing language and the “general” Python programming language should remain aligned, so the implications of syntax change proposed in the PEP for typing needed to be addressed for non-typed Python as well. The PEP explains this change well, and does a good job of justifying the semantics and usefulness of the change for non-type related purposes.

Please feel free to change the PEP status to Accepted, and to merge your changes to Python 3.11 at your convenience.

With our appreciation,
-Barry (on behalf of the Python Steering Council)

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Re: SC Acceptance: PEP 646 -- Variadic Generics [ In reply to ]

python-dev at python

Nov 18, 2021, 8:44 AM

Post #2 of 4 (309 views)

Permalink

Hi Barry,

Absolutely fantastic - thank you for letting us know! As Guido says,
there's one final thing that we thought would be easy to resolve but has
actually turned out to be a little tricky. Happy to proceed as you think is
best here.

Matthew

On Wed, 17 Nov 2021 at 22:33, Guido van Rossum <guido@python.org> wrote:

> Hi Barry,
>
> That's fantastic news!
>
> Somewhat embarrassingly, on typing-sig we're still discussing one or two
> final tweaks. In particular, the PEP as accepted forbids a certain
> construct (passing a tuple of indefinite length to a function using `*args:
> *Ts`) that after all we may actually want to allow. This would affect
> static type checkers only, there's no change in the grammar or runtime
> associated with lifting this restriction. See
> https://github.com/python/peps/pull/2125
>
> I presume the SC is okay with that?
>
> --Guido
>
> On Wed, Nov 17, 2021 at 2:15 PM Barry Warsaw <barry@python.org> wrote:
>
>> Hello Mark, Matthew, Pradeep, Vincent, and Guido,
>>
>> The Python Steering Council discussed the latest version of PEP 646
>> (Variadic Generics) at our last meeting, and have unanimously decided to
>> accept the PEP. Congratulations!
>>
>> We want to specifically mention that we appreciate the way you called out
>> the Python grammar changes required by the typing features you proposed.
>> As we’ve said before, the Steering Council strongly believes that the
>> typing language and the “general” Python programming language should remain
>> aligned, so the implications of syntax change proposed in the PEP for
>> typing needed to be addressed for non-typed Python as well. The PEP
>> explains this change well, and does a good job of justifying the semantics
>> and usefulness of the change for non-type related purposes.
>>
>> Please feel free to change the PEP status to Accepted, and to merge your
>> changes to Python 3.11 at your convenience.
>>
>> With our appreciation,
>> -Barry (on behalf of the Python Steering Council)
>>
>>
>
> --
> --Guido van Rossum (python.org/~guido)
> *Pronouns: he/him **(why is my pronoun here?)*
> <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
>

Re: SC Acceptance: PEP 646 -- Variadic Generics [ In reply to ]

brett at python

Nov 18, 2021, 11:30 AM

Post #3 of 4 (309 views)

Permalink

I put the PEP back on our agenda to discuss this.

On Wed, Nov 17, 2021 at 2:40 PM Guido van Rossum <guido@python.org> wrote:

> Hi Barry,
>
> That's fantastic news!
>
> Somewhat embarrassingly, on typing-sig we're still discussing one or two
> final tweaks. In particular, the PEP as accepted forbids a certain
> construct (passing a tuple of indefinite length to a function using `*args:
> *Ts`) that after all we may actually want to allow. This would affect
> static type checkers only, there's no change in the grammar or runtime
> associated with lifting this restriction. See
> https://github.com/python/peps/pull/2125
>
> I presume the SC is okay with that?
>
> --Guido
>
> On Wed, Nov 17, 2021 at 2:15 PM Barry Warsaw <barry@python.org> wrote:
>
>> Hello Mark, Matthew, Pradeep, Vincent, and Guido,
>>
>> The Python Steering Council discussed the latest version of PEP 646
>> (Variadic Generics) at our last meeting, and have unanimously decided to
>> accept the PEP. Congratulations!
>>
>> We want to specifically mention that we appreciate the way you called out
>> the Python grammar changes required by the typing features you proposed.
>> As we’ve said before, the Steering Council strongly believes that the
>> typing language and the “general” Python programming language should remain
>> aligned, so the implications of syntax change proposed in the PEP for
>> typing needed to be addressed for non-typed Python as well. The PEP
>> explains this change well, and does a good job of justifying the semantics
>> and usefulness of the change for non-type related purposes.
>>
>> Please feel free to change the PEP status to Accepted, and to merge your
>> changes to Python 3.11 at your convenience.
>>
>> With our appreciation,
>> -Barry (on behalf of the Python Steering Council)
>>
>>
>
> --
> --Guido van Rossum (python.org/~guido)
> *Pronouns: he/him **(why is my pronoun here?)*
> <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
> _______________________________________________
> Python-Dev mailing list -- python-dev@python.org
> To unsubscribe send an email to python-dev-leave@python.org
> https://mail.python.org/mailman3/lists/python-dev.python.org/
> Message archived at
> https://mail.python.org/archives/list/python-dev@python.org/message/YBSS4FJ474TJ23XOUSFI5E6N7GAXB3T5/
> Code of Conduct: http://python.org/psf/codeofconduct/
>

Re: SC Acceptance: PEP 646 -- Variadic Generics [ In reply to ]

python-dev at python

Nov 19, 2021, 3:33 AM

Post #4 of 4 (309 views)

Permalink

Thanks, Brett. We'll notify you once we've resolved the issue.

On Thu, 18 Nov 2021 at 19:30, Brett Cannon <brett@python.org> wrote:

> I put the PEP back on our agenda to discuss this.
>
> On Wed, Nov 17, 2021 at 2:40 PM Guido van Rossum <guido@python.org> wrote:
>
>> Hi Barry,
>>
>> That's fantastic news!
>>
>> Somewhat embarrassingly, on typing-sig we're still discussing one or two
>> final tweaks. In particular, the PEP as accepted forbids a certain
>> construct (passing a tuple of indefinite length to a function using `*args:
>> *Ts`) that after all we may actually want to allow. This would affect
>> static type checkers only, there's no change in the grammar or runtime
>> associated with lifting this restriction. See
>> https://github.com/python/peps/pull/2125
>>
>> I presume the SC is okay with that?
>>
>> --Guido
>>
>> On Wed, Nov 17, 2021 at 2:15 PM Barry Warsaw <barry@python.org> wrote:
>>
>>> Hello Mark, Matthew, Pradeep, Vincent, and Guido,
>>>
>>> The Python Steering Council discussed the latest version of PEP 646
>>> (Variadic Generics) at our last meeting, and have unanimously decided to
>>> accept the PEP. Congratulations!
>>>
>>> We want to specifically mention that we appreciate the way you called
>>> out the Python grammar changes required by the typing features you
>>> proposed. As we’ve said before, the Steering Council strongly believes
>>> that the typing language and the “general” Python programming language
>>> should remain aligned, so the implications of syntax change proposed in the
>>> PEP for typing needed to be addressed for non-typed Python as well. The
>>> PEP explains this change well, and does a good job of justifying the
>>> semantics and usefulness of the change for non-type related purposes.
>>>
>>> Please feel free to change the PEP status to Accepted, and to merge your
>>> changes to Python 3.11 at your convenience.
>>>
>>> With our appreciation,
>>> -Barry (on behalf of the Python Steering Council)
>>>
>>>
>>
>> --
>> --Guido van Rossum (python.org/~guido)
>> *Pronouns: he/him **(why is my pronoun here?)*
>> <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
>> _______________________________________________
>> Python-Dev mailing list -- python-dev@python.org
>> To unsubscribe send an email to python-dev-leave@python.org
>> https://mail.python.org/mailman3/lists/python-dev.python.org/
>> Message archived at
>> https://mail.python.org/archives/list/python-dev@python.org/message/YBSS4FJ474TJ23XOUSFI5E6N7GAXB3T5/
>> Code of Conduct: http://python.org/psf/codeofconduct/
>>
>