[Python-Dev] Re: PEP 649: Deferred Evaluation Of Annotations

On Wed, Aug 11, 2021 at 2:56 PM Thomas Grainger wrote: > Would: > ``` > @dataclass > class Node: > global_node: __class__ | None > ``` > > "Just work" with co_annotations? > This feels too specialized to me. It would be great to also handle forward references to other classes and cyclic

[Python-Dev] Re: PEP 649: Deferred Evaluation Of Annotations

On Wed, Aug 11, 2021 at 10:32 AM Thomas Grainger wrote: > Larry Hastings wrote: > > On 8/11/21 12:02 AM, Thomas Grainger wrote: > > > I think as long as there's a test case for something like > > > @dataclass > > > class Node: > > > global_node: ClassVar[Node | None] > > > left:

[Python-Dev] Re: PEP 563 in light of PEP 649

On Fri, Apr 16, 2021 at 5:28 PM Łukasz Langa wrote: > [snip] I say "compromise" because as Inada Naoki measured, there's still a > non-zero performance cost of PEP 649 versus PEP 563: > > - code size: +63% > - memory: +62% > - import time: +60% > > > Will this hurt some current users of typing?

[Python-Dev] Re: In support of PEP 649

On Fri, Apr 16, 2021 at 8:27 AM Inada Naoki wrote: > After PEP 563, only `'List[int]'` is practical so we can stop > supporting `List["int"]` and others at some point. > There's a lot of code written before PEP 563 was available (and code that needs to support earlier Python versions) that

[Python-Dev] PEP 589 discussion (TypedDict) happening at typing-sig@

with a value of a specific type. Jukka Lehtosalo [1] https://mail.python.org/mailman3/lists/typing-sig.python.org/ ___ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman

Re: [Python-Dev] PEP 563: Postponed Evaluation of Annotations

On Thu, Nov 2, 2017 at 3:45 PM, Steven D'Aprano wrote: > On Wed, Nov 01, 2017 at 03:48:00PM -0700, Lukasz Langa wrote: > > > This PEP proposes changing function annotations and variable annotations > > so that they are no longer evaluated at function definition time. > >

Re: [Python-Dev] PEP 484 update proposal: annotating decorated declarations

ml> by >> Nick, my response >> <https://mail.python.org/pipermail/python-ideas/2017-May/045557.html>). >> >> Credit for the proposal goes to Naomi Seyfer, with discussion by Ivan >> Levkivskyi and Jukka Lehtosalo. >> >> If there's no further deb