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gh-103763: Implement PEP 695 #103764

Merged
merged 232 commits into from
May 16, 2023
Merged

gh-103763: Implement PEP 695 #103764

merged 232 commits into from
May 16, 2023

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JelleZijlstra
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@JelleZijlstra JelleZijlstra commented Apr 24, 2023

I will update this message as the status of the PR changes.

This is a complete implementation. It incorporates the changes in python/peps#3122, which were approved by the SC.

I wrote a detailed account of the changes in this PR at https://jellezijlstra.github.io/pep695

Reviews are welcome on any aspect of the implementation.

msfterictraut and others added 30 commits April 8, 2023 18:04
…This commit includes:

1. Parser updates
2. AST updates
3. typing.py updates
4. Unit tests

It does not include the following:
5. Symtable updates
6. Compiler updates
7. C implementations of TypeVar, TypeVarTuple, ParamSpec, Generic
This fixes compilation for me locally.
This isn't fully functional, but it should be enough to unblock work
on the runtime. I'll update this PR as I implement more.
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🤖 New build scheduled with the buildbot fleet by @JelleZijlstra for commit 08d931c 🤖

If you want to schedule another build, you need to add the 🔨 test-with-refleak-buildbots label again.

@bedevere-bot bedevere-bot removed the 🔨 test-with-refleak-buildbots Test PR w/ refleak buildbots; report in status section label May 15, 2023
@JelleZijlstra
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I think the refleaks are unrelated, probably #104510.

@Eclips4
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Eclips4 commented May 15, 2023

I think the refleaks are unrelated, probably #104510.

Yeah, you're right.
Fails in test_gzip, test_httpservers, test_nntplib, test_tarfile, test_xmlrpc related to isolation of io module.

@JelleZijlstra JelleZijlstra merged commit 24d8b88 into python:main May 16, 2023
@gvanrossum
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🎉

carljm added a commit to carljm/cpython that referenced this pull request May 16, 2023
* main:
  pythonGH-104510: Fix refleaks in `_io` base types (python#104516)
  pythongh-104539: Fix indentation error in logging.config.rst (python#104545)
  pythongh-104050: Don't star-import 'types' in Argument Clinic (python#104543)
  pythongh-104050: Add basic typing to CConverter in clinic.py (python#104538)
  pythongh-64595: Fix write file logic in Argument Clinic (python#104507)
  pythongh-104523: Inline minimal PGO rules (python#104524)
  pythongh-103861: Fix Zip64 extensions not being properly applied in some cases (python#103863)
  pythongh-69152: add method get_proxy_response_headers to HTTPConnection class (python#104248)
  pythongh-103763: Implement PEP 695 (python#103764)
  pythongh-104461: Run tkinter test_configure_screen on X11 only (pythonGH-104462)
  pythongh-104469: Convert _testcapi/watchers.c to use Argument Clinic (python#104503)
  pythongh-104482: Fix error handling bugs in ast.c (python#104483)
  pythongh-104341: Adjust tstate_must_exit() to Respect Interpreter Finalization (pythongh-104437)
  pythonGH-102613: Fix recursion error from `pathlib.Path.glob()` (pythonGH-104373)
@carljm
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carljm commented May 16, 2023

Congrats! Really excellent work on a tight timeframe.

@zen-xu
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zen-xu commented May 23, 2023

Awesome!

But will python support Multiple bounds like rust

from typing import Protocol

class Dance(Protocol):
    def dance(self): ...

class Sing(Protocol):
    def sing(self): ...

def perform[P: Dance + Sing](person: P):
    person.dance()
    person.sing()

@sunmy2019
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sunmy2019 commented May 23, 2023

But will python support Multiple bounds like rust

from typing import Protocol

class Dance(Protocol):
    def dance(self): ...

class Sing(Protocol):
    def sing(self): ...

def perform[P: Dance + Sing](person: P):
    person.dance()
    person.sing()

It will not, at least not soon. Changes like this often need a PEP. If you are interested in it, new ideas are welcomed at https://discuss.python.org/c/ideas/6.

As for this specific question, I think you are asking for a typing.Intersection[Dance, Sing]. Some relevant issues here: python/typing#18

https://discuss.python.org/t/type-intersection-and-negation-in-type-annotations/23879

@junkmd
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junkmd commented May 27, 2023

Adding the feature like a Multiple bounds by using a Intersection symbol and/or an & operator has been discussed for over 6 years at python/typing#213.

I hope that the adoption of PEP695 will lead to more discussion on this as well and improve the representation of type hints.

jacobtylerwalls added a commit to jacobtylerwalls/astroid that referenced this pull request Jun 22, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
jacobtylerwalls added a commit to jacobtylerwalls/astroid that referenced this pull request Jun 22, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
jacobtylerwalls added a commit to jacobtylerwalls/astroid that referenced this pull request Jun 22, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
jacobtylerwalls added a commit to jacobtylerwalls/astroid that referenced this pull request Jun 22, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
jacobtylerwalls added a commit to jacobtylerwalls/astroid that referenced this pull request Jun 22, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
jacobtylerwalls added a commit to jacobtylerwalls/astroid that referenced this pull request Jun 22, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
jacobtylerwalls added a commit to jacobtylerwalls/astroid that referenced this pull request Jun 23, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
jacobtylerwalls added a commit to jacobtylerwalls/astroid that referenced this pull request Jun 25, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
jacobtylerwalls added a commit to pylint-dev/astroid that referenced this pull request Jun 27, 2023
A C-accelerator was introduced for the typing module in
Python 3.12 (see python/cpython#103764).

Because a pure python source is no longer available, now we stub
out the missing classes and provide some __class_getitem__
methods to allow subscripting like Type[int].

This may mean when 3.12 is the minimum, we can remove older
brain features like infer_typing_alias().
@AlexWaygood
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@python/organization-owners, please block @johnnyjeannatasha as a spammer — see the review on this PR and the comment at a390ec2#commitcomment-124994466

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