add winloop support and remove deprecated functionality from uvloop by Vizonex · Pull Request #4996 · psf/black

Vizonex · 2026-02-19T00:51:37Z

Description

While I was going about writing a new tool for cython that would help me to format it's language and code neatly I was mainly trying to sift though this code in order to try and come up with some logical solutions or approaches for making a code / file writer since I'm implementing a new cython code formatting tool (and a few other cleaver tools in it's toolbag) since a formatting feature (as far as I am aware of) for cython does not exist. While attempting to read though this code to come up with some ideas, I saw that this library was using uvloop and having maintained a branch for windows I decided to add it in and remove some deprecated features that are in both libraries since I and the uvloop maintainers have already deprecated the install() function.

I might however need some guidance on what I should write in CHANGES.md but from there I should be ok to figure out what else I would need to do to get this pull request merged.

Checklist - did you ...

Implement any code style changes under the --preview style, following the stability policy?
Add an entry in CHANGES.md if necessary?
Add / update tests if necessary?
Add new / update outdated documentation?

cooperlees

LGTM, thanks for this!

I like the function to return the loop. Cleaner.

As for CHANGES.md, just note it in the performance section I'd say and note it's also changed for blackd too.

github-actions · 2026-02-19T02:21:41Z

diff-shades results comparing this PR (118e5c6) to main (4da809e):

--preview style: no changes

--stable style: no changes

What is this? | Workflow run | diff-shades documentation

cooperlees

LGTM - Thanks for this. I forgot about it. Well overdue.

Will leave it for a day or so to see if any other maintainer has preference otherwise I'll merge.

cobaltt7 · 2026-02-19T04:15:44Z

Thanks for this! It looks like CI found some crashes in blackd when running without uvloop, are you able to look into those?

Logs


[gw2] darwin -- Python 3.10.11 /Users/runner/work/black/black/.tox/ci-py310/bin/python
  + Exception Group Traceback (most recent call last):
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/runner.py", line 353, in from_call
  |     result: TResult | None = func()
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/runner.py", line 245, in 
  |     lambda: runtest_hook(item=item, **kwds),
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_hooks.py", line 512, in __call__
  |     return self._hookexec(self.name, self._hookimpls.copy(), kwargs, firstresult)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_manager.py", line 120, in _hookexec
  |     return self._inner_hookexec(hook_name, methods, kwargs, firstresult)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_callers.py", line 167, in _multicall
  |     raise exception
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_callers.py", line 139, in _multicall
  |     teardown.throw(exception)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/logging.py", line 850, in pytest_runtest_call
  |     yield
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_callers.py", line 139, in _multicall
  |     teardown.throw(exception)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_callers.py", line 53, in run_old_style_hookwrapper
  |     return result.get_result()
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_result.py", line 103, in get_result
  |     raise exc.with_traceback(tb)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_callers.py", line 38, in run_old_style_hookwrapper
  |     res = yield
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_callers.py", line 139, in _multicall
  |     teardown.throw(exception)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/capture.py", line 900, in pytest_runtest_call
  |     return (yield)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_callers.py", line 139, in _multicall
  |     teardown.throw(exception)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/skipping.py", line 268, in pytest_runtest_call
  |     return (yield)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/pluggy/_callers.py", line 121, in _multicall
  |     res = hook_impl.function(*args)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/unraisableexception.py", line 158, in pytest_runtest_call
  |     collect_unraisable(item.config)
  |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/unraisableexception.py", line 81, in collect_unraisable
  |     raise ExceptionGroup("multiple unraisable exception warnings", errors)
  | exceptiongroup.ExceptionGroup: multiple unraisable exception warnings (3 sub-exceptions)
  +-+---------------- 1 ----------------
    | Traceback (most recent call last):
    |   File "/Users/runner/work/black/black/tests/test_blackd.py", line 26, in tearDown
    |     gc.collect()
    | ResourceWarning: unclosed 
    | 
    | The above exception was the direct cause of the following exception:
    | 
    | Traceback (most recent call last):
    |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/unraisableexception.py", line 67, in collect_unraisable
    |     warnings.warn(pytest.PytestUnraisableExceptionWarning(msg))
    | pytest.PytestUnraisableExceptionWarning: Exception ignored in: 
    | Enable tracemalloc to get traceback where the object was allocated.
    | See https://docs.pytest.org/en/stable/how-to/capture-warnings.html#resource-warnings for more info.
    +---------------- 2 ----------------
    | Traceback (most recent call last):
    |   File "/Users/runner/work/black/black/tests/test_blackd.py", line 26, in tearDown
    |     gc.collect()
    | ResourceWarning: unclosed 
    | 
    | The above exception was the direct cause of the following exception:
    | 
    | Traceback (most recent call last):
    |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/unraisableexception.py", line 67, in collect_unraisable
    |     warnings.warn(pytest.PytestUnraisableExceptionWarning(msg))
    | pytest.PytestUnraisableExceptionWarning: Exception ignored in: 
    | Enable tracemalloc to get traceback where the object was allocated.
    | See https://docs.pytest.org/en/stable/how-to/capture-warnings.html#resource-warnings for more info.
    +---------------- 3 ----------------
    | Traceback (most recent call last):
    |   File "/Library/Frameworks/Python.framework/Versions/3.10/lib/python3.10/asyncio/base_events.py", line 688, in __del__
    |     _warn(f"unclosed event loop {self!r}", ResourceWarning, source=self)
    | ResourceWarning: unclosed event loop <_UnixSelectorEventLoop running=False closed=False debug=False>
    | 
    | The above exception was the direct cause of the following exception:
    | 
    | Traceback (most recent call last):
    |   File "/Users/runner/work/black/black/.tox/ci-py310/lib/python3.10/site-packages/_pytest/unraisableexception.py", line 67, in collect_unraisable
    |     warnings.warn(pytest.PytestUnraisableExceptionWarning(msg))
    | pytest.PytestUnraisableExceptionWarning: Exception ignored in: 
    | Enable tracemalloc to get traceback where the object was allocated.
    | See https://docs.pytest.org/en/stable/how-to/capture-warnings.html#resource-warnings for more info.
    +------------------------------------

Also, are you able to add windows-latest and windows-11-arm to the uvloop test runner too?

black/.github/workflows/test.yml

Line 108 in 5518079

os: [ubuntu-latest, macOS-latest]

Thanks!

Vizonex · 2026-03-02T18:23:29Z

@cobaltt7 I'm going to see about making it so that there is a safer shutdown mechanism in place since some items are not closing correctly. I'll let you know if I run into false positives when running tests from my own windows 10 laptop.

Vizonex · 2026-03-02T18:52:30Z

@cobaltt7 Something strange and unusual that I've noticed is that when going through the test code if I disable gc.collect() by commenting it out in the teardown function on python 3.10 windows then test_blackd_main passes but test_blackd_python_variant fails. Doing it vice versa causes the opposite effect so I'm wondering if there could be a possible cleanup bug somewhere in the code or if it's an external dependency bug with aiohttp.

Vizonex · 2026-03-02T18:59:14Z

Came with with a workaround that closes the event loop after web.run_app so far all tests on my end seem to pass now. I wonder if I should bring this problem up with aiohttp later since I am a contributor to that library also.

for more information, see https://pre-commit.ci

Vizonex · 2026-03-03T14:52:28Z

@cobaltt7 I'll keep this branch updated until the decision is made to merge.

This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [black](https://github.com/psf/black) ([changelog](https://github.com/psf/black/blob/main/CHANGES.md)) | `<26.1.1,>=26.1.0` → `<26.3.1,>=26.3.0` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/black/26.3.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/black/26.1.0/26.3.0?slim=true) | --- ### Release Notes <details> <summary>psf/black (black)</summary> ### [`v26.3.0`](https://github.com/psf/black/blob/HEAD/CHANGES.md#2630) [Compare Source](psf/black@26.1.0...26.3.0) ##### Stable style - Don't double-decode input, causing non-UTF-8 files to be corrupted ([#4964](psf/black#4964)) - Fix crash on standalone comment in lambda default arguments ([#4993](psf/black#4993)) - Preserve parentheses when `# type: ignore` comments would be merged with other comments on the same line, preventing AST equivalence failures ([#4888](psf/black#4888)) ##### Preview style - Fix bug where `if` guards in `case` blocks were incorrectly split when the pattern had a trailing comma ([#4884](psf/black#4884)) - Fix `string_processing` crashing on unassigned long string literals with trailing commas (one-item tuples) ([#4929](psf/black#4929)) - Simplify implementation of the power operator "hugging" logic ([#4918](psf/black#4918)) ##### Packaging - Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in frozen environments ([#4930](psf/black#4930)) ##### Performance - Introduce winloop for windows as an alternative to uvloop ([#4996](psf/black#4996)) - Remove deprecated function `uvloop.install()` in favor of `uvloop.new_event_loop()` ([#4996](psf/black#4996)) - Rename `maybe_install_uvloop` function to `maybe_use_uvloop` to simplify loop installation and creation of either a uvloop/winloop evenloop or default eventloop ([#4996](psf/black#4996)) ##### Output - Emit a clear warning when the target Python version is newer than the running Python version, since AST safety checks cannot parse newer syntax. Also replace the misleading "INTERNAL ERROR" message with an actionable error explaining the version mismatch ([#4983](psf/black#4983)) ##### *Blackd* - Introduce winloop to be used when windows in use which enables blackd to run faster on windows when winloop is installed. ([#4996](psf/black#4996)) ##### Integrations - Remove unused gallery script ([#5030](psf/black#5030)) - Harden parsing of `black` requirements in the GitHub Action when `use_pyproject` is enabled so that only version specifiers are accepted and direct references such as `black @ https://...` are rejected. Users should upgrade to the latest version of the action as soon as possible. This update is received automatically when using `psf/black@stable`, and is independent of the version of Black installed by the action. ([#5031](psf/black#5031)) ##### Documentation - Expand preview style documentation with detailed examples for `wrap_comprehension_in`, `simplify_power_operator_hugging`, and `wrap_long_dict_values_in_parens` features ([#4987](psf/black#4987)) - Add detailed documentation for formatting Jupyter Notebooks ([#5009](psf/black#5009)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.tainton.uk/repos/webexmemebot/pulls/571 Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk> Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [black](https://github.com/psf/black) ([changelog](https://github.com/psf/black/blob/main/CHANGES.md)) | `<26.1.1,>=26.1.0` → `<26.3.1,>=26.3.0` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/black/26.3.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/black/26.1.0/26.3.0?slim=true) | --- ### Release Notes <details> <summary>psf/black (black)</summary> ### [`v26.3.0`](https://github.com/psf/black/blob/HEAD/CHANGES.md#2630) [Compare Source](psf/black@26.1.0...26.3.0) ##### Stable style - Don't double-decode input, causing non-UTF-8 files to be corrupted ([#4964](psf/black#4964)) - Fix crash on standalone comment in lambda default arguments ([#4993](psf/black#4993)) - Preserve parentheses when `# type: ignore` comments would be merged with other comments on the same line, preventing AST equivalence failures ([#4888](psf/black#4888)) ##### Preview style - Fix bug where `if` guards in `case` blocks were incorrectly split when the pattern had a trailing comma ([#4884](psf/black#4884)) - Fix `string_processing` crashing on unassigned long string literals with trailing commas (one-item tuples) ([#4929](psf/black#4929)) - Simplify implementation of the power operator "hugging" logic ([#4918](psf/black#4918)) ##### Packaging - Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in frozen environments ([#4930](psf/black#4930)) ##### Performance - Introduce winloop for windows as an alternative to uvloop ([#4996](psf/black#4996)) - Remove deprecated function `uvloop.install()` in favor of `uvloop.new_event_loop()` ([#4996](psf/black#4996)) - Rename `maybe_install_uvloop` function to `maybe_use_uvloop` to simplify loop installation and creation of either a uvloop/winloop evenloop or default eventloop ([#4996](psf/black#4996)) ##### Output - Emit a clear warning when the target Python version is newer than the running Python version, since AST safety checks cannot parse newer syntax. Also replace the misleading "INTERNAL ERROR" message with an actionable error explaining the version mismatch ([#4983](psf/black#4983)) ##### *Blackd* - Introduce winloop to be used when windows in use which enables blackd to run faster on windows when winloop is installed. ([#4996](psf/black#4996)) ##### Integrations - Remove unused gallery script ([#5030](psf/black#5030)) - Harden parsing of `black` requirements in the GitHub Action when `use_pyproject` is enabled so that only version specifiers are accepted and direct references such as `black @ https://...` are rejected. Users should upgrade to the latest version of the action as soon as possible. This update is received automatically when using `psf/black@stable`, and is independent of the version of Black installed by the action. ([#5031](psf/black#5031)) ##### Documentation - Expand preview style documentation with detailed examples for `wrap_comprehension_in`, `simplify_power_operator_hugging`, and `wrap_long_dict_values_in_parens` features ([#4987](psf/black#4987)) - Add detailed documentation for formatting Jupyter Notebooks ([#5009](psf/black#5009)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.tainton.uk/repos/pypilot/pulls/421 Reviewed-by: Luke Tainton <luke@tainton.uk> Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk> Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [black](https://github.com/psf/black) ([changelog](https://github.com/psf/black/blob/main/CHANGES.md)) | `<26.1.1,>=26.1.0` → `<26.3.1,>=26.3.0` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/black/26.3.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/black/26.1.0/26.3.0?slim=true) | --- ### Release Notes <details> <summary>psf/black (black)</summary> ### [`v26.3.0`](https://github.com/psf/black/blob/HEAD/CHANGES.md#2630) [Compare Source](psf/black@26.1.0...26.3.0) ##### Stable style - Don't double-decode input, causing non-UTF-8 files to be corrupted ([#4964](psf/black#4964)) - Fix crash on standalone comment in lambda default arguments ([#4993](psf/black#4993)) - Preserve parentheses when `# type: ignore` comments would be merged with other comments on the same line, preventing AST equivalence failures ([#4888](psf/black#4888)) ##### Preview style - Fix bug where `if` guards in `case` blocks were incorrectly split when the pattern had a trailing comma ([#4884](psf/black#4884)) - Fix `string_processing` crashing on unassigned long string literals with trailing commas (one-item tuples) ([#4929](psf/black#4929)) - Simplify implementation of the power operator "hugging" logic ([#4918](psf/black#4918)) ##### Packaging - Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in frozen environments ([#4930](psf/black#4930)) ##### Performance - Introduce winloop for windows as an alternative to uvloop ([#4996](psf/black#4996)) - Remove deprecated function `uvloop.install()` in favor of `uvloop.new_event_loop()` ([#4996](psf/black#4996)) - Rename `maybe_install_uvloop` function to `maybe_use_uvloop` to simplify loop installation and creation of either a uvloop/winloop evenloop or default eventloop ([#4996](psf/black#4996)) ##### Output - Emit a clear warning when the target Python version is newer than the running Python version, since AST safety checks cannot parse newer syntax. Also replace the misleading "INTERNAL ERROR" message with an actionable error explaining the version mismatch ([#4983](psf/black#4983)) ##### *Blackd* - Introduce winloop to be used when windows in use which enables blackd to run faster on windows when winloop is installed. ([#4996](psf/black#4996)) ##### Integrations - Remove unused gallery script ([#5030](psf/black#5030)) - Harden parsing of `black` requirements in the GitHub Action when `use_pyproject` is enabled so that only version specifiers are accepted and direct references such as `black @ https://...` are rejected. Users should upgrade to the latest version of the action as soon as possible. This update is received automatically when using `psf/black@stable`, and is independent of the version of Black installed by the action. ([#5031](psf/black#5031)) ##### Documentation - Expand preview style documentation with detailed examples for `wrap_comprehension_in`, `simplify_power_operator_hugging`, and `wrap_long_dict_values_in_parens` features ([#4987](psf/black#4987)) - Add detailed documentation for formatting Jupyter Notebooks ([#5009](psf/black#5009)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.tainton.uk/luke/instant-msg-api/pulls/246 Reviewed-by: Luke Tainton <luke@tainton.uk> Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk> Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [black](https://github.com/psf/black) ([changelog](https://github.com/psf/black/blob/main/CHANGES.md)) | `<26.1.1,>=26.1.0` → `<26.3.1,>=26.3.0` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/black/26.3.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/black/26.1.0/26.3.0?slim=true) | --- ### Release Notes <details> <summary>psf/black (black)</summary> ### [`v26.3.0`](https://github.com/psf/black/blob/HEAD/CHANGES.md#2630) [Compare Source](psf/black@26.1.0...26.3.0) ##### Stable style - Don't double-decode input, causing non-UTF-8 files to be corrupted ([#4964](psf/black#4964)) - Fix crash on standalone comment in lambda default arguments ([#4993](psf/black#4993)) - Preserve parentheses when `# type: ignore` comments would be merged with other comments on the same line, preventing AST equivalence failures ([#4888](psf/black#4888)) ##### Preview style - Fix bug where `if` guards in `case` blocks were incorrectly split when the pattern had a trailing comma ([#4884](psf/black#4884)) - Fix `string_processing` crashing on unassigned long string literals with trailing commas (one-item tuples) ([#4929](psf/black#4929)) - Simplify implementation of the power operator "hugging" logic ([#4918](psf/black#4918)) ##### Packaging - Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in frozen environments ([#4930](psf/black#4930)) ##### Performance - Introduce winloop for windows as an alternative to uvloop ([#4996](psf/black#4996)) - Remove deprecated function `uvloop.install()` in favor of `uvloop.new_event_loop()` ([#4996](psf/black#4996)) - Rename `maybe_install_uvloop` function to `maybe_use_uvloop` to simplify loop installation and creation of either a uvloop/winloop evenloop or default eventloop ([#4996](psf/black#4996)) ##### Output - Emit a clear warning when the target Python version is newer than the running Python version, since AST safety checks cannot parse newer syntax. Also replace the misleading "INTERNAL ERROR" message with an actionable error explaining the version mismatch ([#4983](psf/black#4983)) ##### *Blackd* - Introduce winloop to be used when windows in use which enables blackd to run faster on windows when winloop is installed. ([#4996](psf/black#4996)) ##### Integrations - Remove unused gallery script ([#5030](psf/black#5030)) - Harden parsing of `black` requirements in the GitHub Action when `use_pyproject` is enabled so that only version specifiers are accepted and direct references such as `black @ https://...` are rejected. Users should upgrade to the latest version of the action as soon as possible. This update is received automatically when using `psf/black@stable`, and is independent of the version of Black installed by the action. ([#5031](psf/black#5031)) ##### Documentation - Expand preview style documentation with detailed examples for `wrap_comprehension_in`, `simplify_power_operator_hugging`, and `wrap_long_dict_values_in_parens` features ([#4987](psf/black#4987)) - Add detailed documentation for formatting Jupyter Notebooks ([#5009](psf/black#5009)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.tainton.uk/repos/epage/pulls/208 Reviewed-by: Luke Tainton <luke@tainton.uk> Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk> Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [black](https://github.com/psf/black) ([changelog](https://github.com/psf/black/blob/main/CHANGES.md)) | `<26.1.1,>=26.1.0` → `<26.3.1,>=26.3.0` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/black/26.3.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/black/26.1.0/26.3.0?slim=true) | --- ### Release Notes <details> <summary>psf/black (black)</summary> ### [`v26.3.0`](https://github.com/psf/black/blob/HEAD/CHANGES.md#2630) [Compare Source](psf/black@26.1.0...26.3.0) ##### Stable style - Don't double-decode input, causing non-UTF-8 files to be corrupted ([#4964](psf/black#4964)) - Fix crash on standalone comment in lambda default arguments ([#4993](psf/black#4993)) - Preserve parentheses when `# type: ignore` comments would be merged with other comments on the same line, preventing AST equivalence failures ([#4888](psf/black#4888)) ##### Preview style - Fix bug where `if` guards in `case` blocks were incorrectly split when the pattern had a trailing comma ([#4884](psf/black#4884)) - Fix `string_processing` crashing on unassigned long string literals with trailing commas (one-item tuples) ([#4929](psf/black#4929)) - Simplify implementation of the power operator "hugging" logic ([#4918](psf/black#4918)) ##### Packaging - Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in frozen environments ([#4930](psf/black#4930)) ##### Performance - Introduce winloop for windows as an alternative to uvloop ([#4996](psf/black#4996)) - Remove deprecated function `uvloop.install()` in favor of `uvloop.new_event_loop()` ([#4996](psf/black#4996)) - Rename `maybe_install_uvloop` function to `maybe_use_uvloop` to simplify loop installation and creation of either a uvloop/winloop evenloop or default eventloop ([#4996](psf/black#4996)) ##### Output - Emit a clear warning when the target Python version is newer than the running Python version, since AST safety checks cannot parse newer syntax. Also replace the misleading "INTERNAL ERROR" message with an actionable error explaining the version mismatch ([#4983](psf/black#4983)) ##### *Blackd* - Introduce winloop to be used when windows in use which enables blackd to run faster on windows when winloop is installed. ([#4996](psf/black#4996)) ##### Integrations - Remove unused gallery script ([#5030](psf/black#5030)) - Harden parsing of `black` requirements in the GitHub Action when `use_pyproject` is enabled so that only version specifiers are accepted and direct references such as `black @ https://...` are rejected. Users should upgrade to the latest version of the action as soon as possible. This update is received automatically when using `psf/black@stable`, and is independent of the version of Black installed by the action. ([#5031](psf/black#5031)) ##### Documentation - Expand preview style documentation with detailed examples for `wrap_comprehension_in`, `simplify_power_operator_hugging`, and `wrap_long_dict_values_in_parens` features ([#4987](psf/black#4987)) - Add detailed documentation for formatting Jupyter Notebooks ([#5009](psf/black#5009)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.tainton.uk/repos/PwnedPW/pulls/326 Reviewed-by: Luke Tainton <luke@tainton.uk> Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk> Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

This PR contains the following updates: | Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) | |---|---|---|---| | [black](https://github.com/psf/black) ([changelog](https://github.com/psf/black/blob/main/CHANGES.md)) | `<26.1.1,>=26.1.0` → `<26.3.1,>=26.3.0` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/black/26.3.0?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/black/26.1.0/26.3.0?slim=true) | --- ### Release Notes <details> <summary>psf/black (black)</summary> ### [`v26.3.0`](https://github.com/psf/black/blob/HEAD/CHANGES.md#2630) [Compare Source](psf/black@26.1.0...26.3.0) ##### Stable style - Don't double-decode input, causing non-UTF-8 files to be corrupted ([#4964](psf/black#4964)) - Fix crash on standalone comment in lambda default arguments ([#4993](psf/black#4993)) - Preserve parentheses when `# type: ignore` comments would be merged with other comments on the same line, preventing AST equivalence failures ([#4888](psf/black#4888)) ##### Preview style - Fix bug where `if` guards in `case` blocks were incorrectly split when the pattern had a trailing comma ([#4884](psf/black#4884)) - Fix `string_processing` crashing on unassigned long string literals with trailing commas (one-item tuples) ([#4929](psf/black#4929)) - Simplify implementation of the power operator "hugging" logic ([#4918](psf/black#4918)) ##### Packaging - Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in frozen environments ([#4930](psf/black#4930)) ##### Performance - Introduce winloop for windows as an alternative to uvloop ([#4996](psf/black#4996)) - Remove deprecated function `uvloop.install()` in favor of `uvloop.new_event_loop()` ([#4996](psf/black#4996)) - Rename `maybe_install_uvloop` function to `maybe_use_uvloop` to simplify loop installation and creation of either a uvloop/winloop evenloop or default eventloop ([#4996](psf/black#4996)) ##### Output - Emit a clear warning when the target Python version is newer than the running Python version, since AST safety checks cannot parse newer syntax. Also replace the misleading "INTERNAL ERROR" message with an actionable error explaining the version mismatch ([#4983](psf/black#4983)) ##### *Blackd* - Introduce winloop to be used when windows in use which enables blackd to run faster on windows when winloop is installed. ([#4996](psf/black#4996)) ##### Integrations - Remove unused gallery script ([#5030](psf/black#5030)) - Harden parsing of `black` requirements in the GitHub Action when `use_pyproject` is enabled so that only version specifiers are accepted and direct references such as `black @ https://...` are rejected. Users should upgrade to the latest version of the action as soon as possible. This update is received automatically when using `psf/black@stable`, and is independent of the version of Black installed by the action. ([#5031](psf/black#5031)) ##### Documentation - Expand preview style documentation with detailed examples for `wrap_comprehension_in`, `simplify_power_operator_hugging`, and `wrap_long_dict_values_in_parens` features ([#4987](psf/black#4987)) - Add detailed documentation for formatting Jupyter Notebooks ([#5009](psf/black#5009)) </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://git.tainton.uk/repos/roboluke/pulls/431 Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk> Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

add winloop support and remove deprecated functionality from uvloop

b8d91fc

cooperlees requested changes Feb 19, 2026

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summarize changes made in pull request psf#4996

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Vizonex requested a review from cooperlees February 19, 2026 02:45

cooperlees approved these changes Feb 19, 2026

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Merge branch 'main' into winloop

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Merge branch 'main' into winloop

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close after running with web.run_app

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pre-commit-ci bot and others added 3 commits March 2, 2026 18:59

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reformat

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add windows-latest and windows-11-arm to uvloop test

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Vizonex requested a review from cooperlees March 2, 2026 19:19

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Merge branch 'main' into winloop

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cooperlees merged commit 8b9d3e3 into psf:main Mar 3, 2026
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add winloop support and remove deprecated functionality from uvloop#4996

add winloop support and remove deprecated functionality from uvloop#4996
cooperlees merged 9 commits intopsf:mainfrom
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