Add support for Python 3.14 #10467

jacobtylerwalls · 2025-07-28T11:40:03Z

Type of Changes

	Type
✓	✨ New feature

jacobtylerwalls · 2025-07-28T11:47:29Z

Blocked by pylint-dev/astroid#2789

cdce8p · 2025-08-06T12:04:07Z

#10480 will help resolve a lot of the issues here. On the astroid side I just created pylint-dev/astroid#2793 to add basic support for TemplateStr.

Pierre-Sassoulas · 2025-08-06T16:36:52Z

Not blocked anymore with astroid 4.0.0b1. Not sure how to best deal with the no-member / no-name-in-module though. I'm not sure that the conditional functional test based on the interpreter are going to work for the expected output too.

cdce8p · 2025-08-06T20:24:04Z

Not blocked anymore with astroid 4.0.0b1. Not sure how to best deal with the no-member / no-name-in-module though. I'm not sure that the conditional functional test based on the interpreter are going to work for the expected output too.

Will take a proper look at it soon. It at least uncovered a false-positive for used-before-assignment I'll address in a separate PR.

tests/functional/g/generic_alias/generic_alias_mixed_py39.py

cdce8p · 2025-08-07T11:12:39Z

CI is looking good now. Interestingly I'm still getting an error locally.

pytest tests/test_functional.py::test_functional[regression_5408]

Crashes with Abort trap: 6 on my machine, MacOS ARM with 3.14.0rc1. If I compile cpython from source it works fine. Maybe it's a fluke?

codecov · 2025-08-07T11:15:28Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95.87%. Comparing base (d363fca) to head (8853532).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10467   +/-   ##
=======================================
  Coverage   95.86%   95.87%           
=======================================
  Files         176      176           
  Lines       19168    19168           
=======================================
+ Hits        18376    18377    +1     
+ Misses        792      791    -1

Files with missing lines	Coverage Δ
pylint/checkers/base/basic_error_checker.py	`95.41% <100.00%> (ø)`

... and 1 file with indirect coverage changes

🚀 New features to boost your workflow:

❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

doc/whatsnew/fragments/10467.other

Pierre-Sassoulas · 2025-08-07T11:21:26Z

Amazing ! Regarding the abort trap, I don't know, but I think that's outside pylint's purview.

I don't remember if I was the one who removed the new "Forward" functional tests specifically for 3.14 or if it was you (importing from annotationlib instead of typing), do you think it make sense to add it back ?

cdce8p · 2025-08-07T11:28:35Z

Amazing ! Regarding the abort trap, I don't know, but I think that's outside pylint's purview.

Would you mind running the test on your machine? If the error is more common, it might still be related / caused by pylint or astroid. Though at the moment I suspect it's just some issue on my machine.

I don't remember if I was the one who removed the new "Forward" functional tests specifically for 3.14 or if it was you (importing from annotationlib instead of typing), do you think it make sense to add it back ?

I removed it while pushing 8c4750a. It's not really necessary since with pylint-dev/astroid#2795, typing.ForwardRef just delegates to annotationlib.ForwardRef anyway. Without 8c4750a the test case would fail even with the import from typing.

github-actions · 2025-08-07T11:49:54Z

🤖 According to the primer, this change has no effect on the checked open source code. 🤖🎉

This comment was generated for commit 8853532

Pierre-Sassoulas · 2025-08-07T12:04:05Z

Would you mind running the test on your machine?

Sure, but I have ubuntu 24.04.2 LTS (tested with python 3.14 alpha 6 and python 3.14 rc1 installed with uv), no crashes.

If the error is more common, it might still be related / caused by pylint or astroid.

"revealed" right ? As in it's a bug in cpython that we can maybe avoid triggering with some guesswork ?

cdce8p · 2025-08-07T13:39:00Z

If the error is more common, it might still be related / caused by pylint or astroid.

"revealed" right ? As in it's a bug in cpython that we can maybe avoid triggering with some guesswork ?

Yeah, if it was just on my machine it's probably nothing. However, if it can be reproduced reliably that's a different story.
Looks like it's the latter. Was able to reproduce it in a CI run: https://github.com/cdce8p/pylint/actions/runs/16805911305/job/47598155830

Removing these lines here is enough for the error to go away but that's not really the point.

pylint/tests/functional/r/regression_02/regression_5408.py

Lines 35 to 37 in d363fca

    
           class Child(_Child): 
        
               def patch(cls): 
        
                   MyClass.sub_class.inner_class = cls

Looks like I need to investigate that a bit further.

--
Unless you think otherwise I'd say it doesn't block this PR though. The changes here are itself correct and the issue seems to be with cpython on MacOS exclusively AFAICT at the moment.

cdce8p · 2025-08-14T18:03:19Z

Small followup on the MacOS crash. Turns out the stack overflow was a bug in CPython. Thanks to some amazing folks over there it was fixed within a few days and is already included in 3.14.0rc2 which was released today.

python/cpython#137573

This PR contains the following updates: | Package | Change | Age | Confidence | |---|---|---|---| | [pylint](https://github.com/pylint-dev/pylint) ([changelog](https://pylint.readthedocs.io/en/latest/whatsnew/3/)) | `<4.0.0,>=3.3.3` -> `<4.1.0,>=4.0.0` | [![age](https://developer.mend.io/api/mc/badges/age/pypi/pylint/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pylint/3.3.9/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>pylint-dev/pylint (pylint)</summary> ### [`v4.0.0`](https://github.com/pylint-dev/pylint/releases/tag/v4.0.0) [Compare Source](pylint-dev/pylint@v3.3.9...v4.0.0) - Pylint now supports Python 3.14. - Pylint's inference engine (`astroid`) is now much more precise, understanding implicit booleanness and ternary expressions. (Thanks [@zenlyj](https://github.com/zenlyj)!) Consider this example: ```python class Result: errors: dict | None = None result = Result() if result.errors: result.errors[field_key] ### inference engine understands result.errors cannot be None ### pylint no longer raises unsubscriptable-object ``` The required `astroid` version is now 4.0.0. See the [astroid changelog](https://pylint.readthedocs.io/projects/astroid/en/latest/changelog.html#what-s-new-in-astroid-4-0-0) for additional fixes, features, and performance improvements applicable to pylint. - Handling of `invalid-name` at the module level was patchy. Now, module-level constants that are reassigned are treated as variables and checked against `--variable-rgx` rather than `--const-rgx`. Module-level lists, sets, and objects can pass against either regex. Here, `LIMIT` is reassigned, so pylint only uses `--variable-rgx`: ```python LIMIT = 500 # [invalid-name] if sometimes: LIMIT = 1 # [invalid-name] ``` If this is undesired, refactor using *exclusive* assignment so that it is evident that this assignment happens only once: ```python if sometimes: LIMIT = 1 else: LIMIT = 500 # exclusive assignment: uses const regex, no warning ``` Lists, sets, and objects still pass against either `const-rgx` or `variable-rgx` even if reassigned, but are no longer completely skipped: ```python MY_LIST = [] my_list = [] My_List = [] # [invalid-name] ``` Remember to adjust the [regexes](https://pylint.readthedocs.io/en/latest/user_guide/messages/convention/invalid-name.html) and [allow lists](https://pylint.readthedocs.io/en/latest/user_guide/configuration/all-options.html#good-names) to your liking. ## Breaking Changes - `invalid-name` now distinguishes module-level constants that are assigned only once from those that are reassigned and now applies `--variable-rgx` to the latter. Values other than literals (lists, sets, objects) can pass against either the constant or variable regexes (e.g. "LOGGER" or "logger" but not "LoGgEr"). Remember that `--good-names` or `--good-names-rgxs` can be provided to explicitly allow good names. Closes [#3585](pylint-dev/pylint#3585) - The unused `pylintrc` argument to `PyLinter.__init__()` is deprecated and will be removed. Refs [#6052](pylint-dev/pylint#6052) - Commented out code blocks such as `# bar() # TODO: remove dead code` will no longer emit `fixme`. Refs [#9255](pylint-dev/pylint#9255) - `pyreverse` `Run` was changed to no longer call `sys.exit()` in its `__init__`. You should now call `Run(args).run()` which will return the exit code instead. Having a class that always raised a `SystemExit` exception was considered a bug. Normal usage of pyreverse through the CLI will not be affected by this change. Refs [#9689](pylint-dev/pylint#9689) - The `suggestion-mode` option was removed, as pylint now always emits user-friendly hints instead of false-positive error messages. You should remove it from your conf if it's defined. Refs [#9962](pylint-dev/pylint#9962) - The `async.py` checker module has been renamed to `async_checker.py` since `async` is a Python keyword and cannot be imported directly. This allows for better testing and extensibility of the async checker functionality. Refs [#10071](pylint-dev/pylint#10071) - The message-id of `continue-in-finally` was changed from `E0116` to `W0136`. The warning is now emitted for every Python version since it will raise a syntax warning in Python 3.14. See [PEP 765 - Disallow return/break/continue that exit a finally block](https://peps.python.org/pep-0765/). Refs [#10480](pylint-dev/pylint#10480) - Removed support for `nmp.NaN` alias for `numpy.NaN` being recognized in ':ref:`nan-comparison`'. Use `np` or `numpy` instead. Refs [#10583](pylint-dev/pylint#10583) - Version requirement for `isort` has been bumped to >=5.0.0. The internal compatibility for older `isort` versions exposed via `pylint.utils.IsortDriver` has been removed. Refs [#10637](pylint-dev/pylint#10637) ## New Features - `comparison-of-constants` now uses the unicode from the ast instead of reformatting from the node's values preventing some bad formatting due to `utf-8` limitation. The message now uses `"` instead of `'` to better work with what the python ast returns. Refs [#8736](pylint-dev/pylint#8736) - Enhanced pyreverse to properly distinguish between UML relationship types (association, aggregation, composition) based on object ownership semantics. Type annotations without assignment are now treated as associations, parameter assignments as aggregations, and object instantiation as compositions. Closes [#9045](pylint-dev/pylint#9045) Closes [#9267](pylint-dev/pylint#9267) - The `fixme` check can now search through docstrings as well as comments, by using `check-fixme-in-docstring = true` in the `[tool.pylint.miscellaneous]` section. Closes [#9255](pylint-dev/pylint#9255) - The `use-implicit-booleaness-not-x` checks now distinguish between comparisons used in boolean contexts and those that are not, enabling them to provide more accurate refactoring suggestions. Closes [#9353](pylint-dev/pylint#9353) - The verbose option now outputs the filenames of the files that have been checked. Previously, it only included the number of checked and skipped files. Closes [#9357](pylint-dev/pylint#9357) - colorized reporter now colorizes messages/categories that have been configured as `fail-on` in red inverse. This makes it easier to quickly find the errors that are causing pylint CI job failures. Closes [#9898](pylint-dev/pylint#9898) - Enhanced support for [@property](https://github.com/property) decorator in pyreverse to correctly display return types of annotated properties when generating class diagrams. Closes [#10057](pylint-dev/pylint#10057) - Add --max-depth option to pyreverse to control diagram complexity. A depth of 0 shows only top-level packages, 1 shows one level of subpackages, etc. This helps manage visualization of large codebases by limiting the depth of displayed packages and classes. Refs [#10077](pylint-dev/pylint#10077) - Handle deferred evaluation of annotations in Python 3.14. Closes [#10149](pylint-dev/pylint#10149) - Enhanced pyreverse to properly detect aggregations for comprehensions (list, dict, set, generator). Closes [#10236](pylint-dev/pylint#10236) - `pyreverse`: add support for colorized output when using output format `mmd` (MermaidJS) and `html`. Closes [#10242](pylint-dev/pylint#10242) - pypy 3.11 is now officially supported. Refs [#10287](pylint-dev/pylint#10287) - Add support for Python 3.14. Refs [#10467](pylint-dev/pylint#10467) - Add naming styles for `ParamSpec` and `TypeVarTuple` that align with the `TypeVar` style. Refs [#10541](pylint-dev/pylint#10541) ## New Checks - Add `match-statements` checker and the following message: `bare-name-capture-pattern`. This will emit an error message when a name capture pattern is used in a match statement which would make the remaining patterns unreachable. This code is a SyntaxError at runtime. Closes [#7128](pylint-dev/pylint#7128) - Add new check `async-context-manager-with-regular-with` to detect async context managers used with regular `with` statements instead of `async with`. Refs [#10408](pylint-dev/pylint#10408) - Add `break-in-finally` warning. Using `break` inside the `finally` clause will raise a syntax warning in Python 3.14. See `PEP 765 - Disallow return/break/continue that exit a finally block <https://peps.python.org/pep-0765/>`\_. Refs [#10480](pylint-dev/pylint#10480) - Add new checks for invalid uses of class patterns in :keyword:`match`. - :ref:`invalid-match-args-definition` is emitted if :py:data:`object.__match_args__` isn't a tuple of strings. - :ref:`too-many-positional-sub-patterns` if there are more positional sub-patterns than specified in :py:data:`object.__match_args__`. - :ref:`multiple-class-sub-patterns` if there are multiple sub-patterns for the same attribute. Refs [#10559](pylint-dev/pylint#10559) - Add additional checks for suboptimal uses of class patterns in :keyword:`match`. - :ref:`match-class-bind-self` is emitted if a name is bound to `self` instead of using an `as` pattern. - :ref:`match-class-positional-attributes` is emitted if a class pattern has positional attributes when keywords could be used. Refs [#10587](pylint-dev/pylint#10587) - Add a `consider-math-not-float` message. `float("nan")` and `float("inf")` are slower than their counterpart `math.inf` and `math.nan` by a factor of 4 (notwithstanding the initial import of math) and they are also not well typed when using mypy. This check also catches typos in float calls as a side effect. The :ref:`pylint.extensions.code_style` need to be activated for this check to work. Refs [#10621](pylint-dev/pylint#10621) ## False Positives Fixed - Fix a false positive for `used-before-assignment` when a variable defined under an `if` and via a named expression (walrus operator) is used later when guarded under the same `if` test. Closes [#10061](pylint-dev/pylint#10061) - Fix :ref:`no-name-in-module` for members of `concurrent.futures` with Python 3.14. Closes [#10632](pylint-dev/pylint#10632) ## False Negatives Fixed - Fix false negative for `used-before-assignment` when a `TYPE_CHECKING` import is used as a type annotation prior to erroneous usage. Refs [#8893](pylint-dev/pylint#8893) - Match cases are now counted as edges in the McCabe graph and will increase the complexity accordingly. Refs [#9667](pylint-dev/pylint#9667) - Check module-level constants with type annotations for `invalid-name`. Remember to adjust `const-naming-style` or `const-rgx` to your liking. Closes [#9770](pylint-dev/pylint#9770) - Fix false negative where function-redefined (E0102) was not reported for functions with a leading underscore. Closes [#9894](pylint-dev/pylint#9894) - We now raise a `logging-too-few-args` for format string with no interpolation arguments at all (i.e. for something like `logging.debug("Awaiting process %s")` or `logging.debug("Awaiting process {pid}")`). Previously we did not raise for such case. Closes [#9999](pylint-dev/pylint#9999) - Fix false negative for `used-before-assignment` when a function is defined inside a `TYPE_CHECKING` guard block and used later. Closes [#10028](pylint-dev/pylint#10028) - Fix a false negative for `possibly-used-before-assignment` when a variable is conditionally defined and later assigned to a type-annotated variable. Closes [#10421](pylint-dev/pylint#10421) - Fix false negative for `deprecated-module` when a `__import__` method is used instead of `import` sentence. Refs [#10453](pylint-dev/pylint#10453) - Count match cases for `too-many-branches` check. Refs [#10542](pylint-dev/pylint#10542) - Fix false-negative where :ref:`unused-import` was not reported for names referenced in a preceding `global` statement. Refs [#10633](pylint-dev/pylint#10633) ## Other Bug Fixes - When displaying unicode with surrogates (or other potential `UnicodeEncodeError`), pylint will now display a '?' character (using `encode(encoding="utf-8", errors="replace")`) instead of crashing. The functional tests classes are also updated to handle this case. Closes [#8736](pylint-dev/pylint#8736) - Fixed unidiomatic-typecheck only checking left-hand side. Closes [#10217](pylint-dev/pylint#10217) - Fix a crash caused by malformed format strings when using `.format` with keyword arguments. Closes [#10282](pylint-dev/pylint#10282) - Fix false positive `inconsistent-return-statements` when using `quit()` or `exit()` functions. Closes [#10508](pylint-dev/pylint#10508) - Fix a crash in :ref:`nested-min-max` when using `builtins.min` or `builtins.max` instead of `min` or `max` directly. Closes [#10626](pylint-dev/pylint#10626) - Fixed a crash in :ref:`unnecessary-dict-index-lookup` when the index of an enumerated list was deleted inside a for loop. Closes [#10627](pylint-dev/pylint#10627) ## Other Changes - Remove support for launching pylint with Python 3.9. Code that supports Python 3.9 can still be linted with the `--py-version=3.9` setting. Refs [#10405](pylint-dev/pylint#10405) ## Internal Changes - Modified test framework to allow for different test output for different Python versions. Refs [#10382](pylint-dev/pylint#10382) </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/384 Co-authored-by: renovate[bot] <[email protected]> Co-committed-by: renovate[bot] <[email protected]>

This PR contains the following updates: | Package | Change | Age | Confidence | |---|---|---|---| | [pylint](https://github.com/pylint-dev/pylint) ([changelog](https://pylint.readthedocs.io/en/latest/whatsnew/3/)) | `<4.0.0,>=3.3.3` -> `<4.1.0,>=4.0.0` | [![age](https://developer.mend.io/api/mc/badges/age/pypi/pylint/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/pylint/3.3.9/4.0.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | --- ### Release Notes <details> <summary>pylint-dev/pylint (pylint)</summary> ### [`v4.0.0`](https://github.com/pylint-dev/pylint/releases/tag/v4.0.0) [Compare Source](pylint-dev/pylint@v3.3.9...v4.0.0) - Pylint now supports Python 3.14. - Pylint's inference engine (`astroid`) is now much more precise, understanding implicit booleanness and ternary expressions. (Thanks [@zenlyj](https://github.com/zenlyj)!) Consider this example: ```python class Result: errors: dict | None = None result = Result() if result.errors: result.errors[field_key] ### inference engine understands result.errors cannot be None ### pylint no longer raises unsubscriptable-object ``` The required `astroid` version is now 4.0.0. See the [astroid changelog](https://pylint.readthedocs.io/projects/astroid/en/latest/changelog.html#what-s-new-in-astroid-4-0-0) for additional fixes, features, and performance improvements applicable to pylint. - Handling of `invalid-name` at the module level was patchy. Now, module-level constants that are reassigned are treated as variables and checked against `--variable-rgx` rather than `--const-rgx`. Module-level lists, sets, and objects can pass against either regex. Here, `LIMIT` is reassigned, so pylint only uses `--variable-rgx`: ```python LIMIT = 500 # [invalid-name] if sometimes: LIMIT = 1 # [invalid-name] ``` If this is undesired, refactor using *exclusive* assignment so that it is evident that this assignment happens only once: ```python if sometimes: LIMIT = 1 else: LIMIT = 500 # exclusive assignment: uses const regex, no warning ``` Lists, sets, and objects still pass against either `const-rgx` or `variable-rgx` even if reassigned, but are no longer completely skipped: ```python MY_LIST = [] my_list = [] My_List = [] # [invalid-name] ``` Remember to adjust the [regexes](https://pylint.readthedocs.io/en/latest/user_guide/messages/convention/invalid-name.html) and [allow lists](https://pylint.readthedocs.io/en/latest/user_guide/configuration/all-options.html#good-names) to your liking. ## Breaking Changes - `invalid-name` now distinguishes module-level constants that are assigned only once from those that are reassigned and now applies `--variable-rgx` to the latter. Values other than literals (lists, sets, objects) can pass against either the constant or variable regexes (e.g. "LOGGER" or "logger" but not "LoGgEr"). Remember that `--good-names` or `--good-names-rgxs` can be provided to explicitly allow good names. Closes [#3585](pylint-dev/pylint#3585) - The unused `pylintrc` argument to `PyLinter.__init__()` is deprecated and will be removed. Refs [#6052](pylint-dev/pylint#6052) - Commented out code blocks such as `# bar() # TODO: remove dead code` will no longer emit `fixme`. Refs [#9255](pylint-dev/pylint#9255) - `pyreverse` `Run` was changed to no longer call `sys.exit()` in its `__init__`. You should now call `Run(args).run()` which will return the exit code instead. Having a class that always raised a `SystemExit` exception was considered a bug. Normal usage of pyreverse through the CLI will not be affected by this change. Refs [#9689](pylint-dev/pylint#9689) - The `suggestion-mode` option was removed, as pylint now always emits user-friendly hints instead of false-positive error messages. You should remove it from your conf if it's defined. Refs [#9962](pylint-dev/pylint#9962) - The `async.py` checker module has been renamed to `async_checker.py` since `async` is a Python keyword and cannot be imported directly. This allows for better testing and extensibility of the async checker functionality. Refs [#10071](pylint-dev/pylint#10071) - The message-id of `continue-in-finally` was changed from `E0116` to `W0136`. The warning is now emitted for every Python version since it will raise a syntax warning in Python 3.14. See [PEP 765 - Disallow return/break/continue that exit a finally block](https://peps.python.org/pep-0765/). Refs [#10480](pylint-dev/pylint#10480) - Removed support for `nmp.NaN` alias for `numpy.NaN` being recognized in ':ref:`nan-comparison`'. Use `np` or `numpy` instead. Refs [#10583](pylint-dev/pylint#10583) - Version requirement for `isort` has been bumped to >=5.0.0. The internal compatibility for older `isort` versions exposed via `pylint.utils.IsortDriver` has been removed. Refs [#10637](pylint-dev/pylint#10637) ## New Features - `comparison-of-constants` now uses the unicode from the ast instead of reformatting from the node's values preventing some bad formatting due to `utf-8` limitation. The message now uses `"` instead of `'` to better work with what the python ast returns. Refs [#8736](pylint-dev/pylint#8736) - Enhanced pyreverse to properly distinguish between UML relationship types (association, aggregation, composition) based on object ownership semantics. Type annotations without assignment are now treated as associations, parameter assignments as aggregations, and object instantiation as compositions. Closes [#9045](pylint-dev/pylint#9045) Closes [#9267](pylint-dev/pylint#9267) - The `fixme` check can now search through docstrings as well as comments, by using `check-fixme-in-docstring = true` in the `[tool.pylint.miscellaneous]` section. Closes [#9255](pylint-dev/pylint#9255) - The `use-implicit-booleaness-not-x` checks now distinguish between comparisons used in boolean contexts and those that are not, enabling them to provide more accurate refactoring suggestions. Closes [#9353](pylint-dev/pylint#9353) - The verbose option now outputs the filenames of the files that have been checked. Previously, it only included the number of checked and skipped files. Closes [#9357](pylint-dev/pylint#9357) - colorized reporter now colorizes messages/categories that have been configured as `fail-on` in red inverse. This makes it easier to quickly find the errors that are causing pylint CI job failures. Closes [#9898](pylint-dev/pylint#9898) - Enhanced support for [@property](https://github.com/property) decorator in pyreverse to correctly display return types of annotated properties when generating class diagrams. Closes [#10057](pylint-dev/pylint#10057) - Add --max-depth option to pyreverse to control diagram complexity. A depth of 0 shows only top-level packages, 1 shows one level of subpackages, etc. This helps manage visualization of large codebases by limiting the depth of displayed packages and classes. Refs [#10077](pylint-dev/pylint#10077) - Handle deferred evaluation of annotations in Python 3.14. Closes [#10149](pylint-dev/pylint#10149) - Enhanced pyreverse to properly detect aggregations for comprehensions (list, dict, set, generator). Closes [#10236](pylint-dev/pylint#10236) - `pyreverse`: add support for colorized output when using output format `mmd` (MermaidJS) and `html`. Closes [#10242](pylint-dev/pylint#10242) - pypy 3.11 is now officially supported. Refs [#10287](pylint-dev/pylint#10287) - Add support for Python 3.14. Refs [#10467](pylint-dev/pylint#10467) - Add naming styles for `ParamSpec` and `TypeVarTuple` that align with the `TypeVar` style. Refs [#10541](pylint-dev/pylint#10541) ## New Checks - Add `match-statements` checker and the following message: `bare-name-capture-pattern`. This will emit an error message when a name capture pattern is used in a match statement which would make the remaining patterns unreachable. This code is a SyntaxError at runtime. Closes [#7128](pylint-dev/pylint#7128) - Add new check `async-context-manager-with-regular-with` to detect async context managers used with regular `with` statements instead of `async with`. Refs [#10408](pylint-dev/pylint#10408) - Add `break-in-finally` warning. Using `break` inside the `finally` clause will raise a syntax warning in Python 3.14. See `PEP 765 - Disallow return/break/continue that exit a finally block <https://peps.python.org/pep-0765/>`\_. Refs [#10480](pylint-dev/pylint#10480) - Add new checks for invalid uses of class patterns in :keyword:`match`. - :ref:`invalid-match-args-definition` is emitted if :py:data:`object.__match_args__` isn't a tuple of strings. - :ref:`too-many-positional-sub-patterns` if there are more positional sub-patterns than specified in :py:data:`object.__match_args__`. - :ref:`multiple-class-sub-patterns` if there are multiple sub-patterns for the same attribute. Refs [#10559](pylint-dev/pylint#10559) - Add additional checks for suboptimal uses of class patterns in :keyword:`match`. - :ref:`match-class-bind-self` is emitted if a name is bound to `self` instead of using an `as` pattern. - :ref:`match-class-positional-attributes` is emitted if a class pattern has positional attributes when keywords could be used. Refs [#10587](pylint-dev/pylint#10587) - Add a `consider-math-not-float` message. `float("nan")` and `float("inf")` are slower than their counterpart `math.inf` and `math.nan` by a factor of 4 (notwithstanding the initial import of math) and they are also not well typed when using mypy. This check also catches typos in float calls as a side effect. The :ref:`pylint.extensions.code_style` need to be activated for this check to work. Refs [#10621](pylint-dev/pylint#10621) ## False Positives Fixed - Fix a false positive for `used-before-assignment` when a variable defined under an `if` and via a named expression (walrus operator) is used later when guarded under the same `if` test. Closes [#10061](pylint-dev/pylint#10061) - Fix :ref:`no-name-in-module` for members of `concurrent.futures` with Python 3.14. Closes [#10632](pylint-dev/pylint#10632) ## False Negatives Fixed - Fix false negative for `used-before-assignment` when a `TYPE_CHECKING` import is used as a type annotation prior to erroneous usage. Refs [#8893](pylint-dev/pylint#8893) - Match cases are now counted as edges in the McCabe graph and will increase the complexity accordingly. Refs [#9667](pylint-dev/pylint#9667) - Check module-level constants with type annotations for `invalid-name`. Remember to adjust `const-naming-style` or `const-rgx` to your liking. Closes [#9770](pylint-dev/pylint#9770) - Fix false negative where function-redefined (E0102) was not reported for functions with a leading underscore. Closes [#9894](pylint-dev/pylint#9894) - We now raise a `logging-too-few-args` for format string with no interpolation arguments at all (i.e. for something like `logging.debug("Awaiting process %s")` or `logging.debug("Awaiting process {pid}")`). Previously we did not raise for such case. Closes [#9999](pylint-dev/pylint#9999) - Fix false negative for `used-before-assignment` when a function is defined inside a `TYPE_CHECKING` guard block and used later. Closes [#10028](pylint-dev/pylint#10028) - Fix a false negative for `possibly-used-before-assignment` when a variable is conditionally defined and later assigned to a type-annotated variable. Closes [#10421](pylint-dev/pylint#10421) - Fix false negative for `deprecated-module` when a `__import__` method is used instead of `import` sentence. Refs [#10453](pylint-dev/pylint#10453) - Count match cases for `too-many-branches` check. Refs [#10542](pylint-dev/pylint#10542) - Fix false-negative where :ref:`unused-import` was not reported for names referenced in a preceding `global` statement. Refs [#10633](pylint-dev/pylint#10633) ## Other Bug Fixes - When displaying unicode with surrogates (or other potential `UnicodeEncodeError`), pylint will now display a '?' character (using `encode(encoding="utf-8", errors="replace")`) instead of crashing. The functional tests classes are also updated to handle this case. Closes [#8736](pylint-dev/pylint#8736) - Fixed unidiomatic-typecheck only checking left-hand side. Closes [#10217](pylint-dev/pylint#10217) - Fix a crash caused by malformed format strings when using `.format` with keyword arguments. Closes [#10282](pylint-dev/pylint#10282) - Fix false positive `inconsistent-return-statements` when using `quit()` or `exit()` functions. Closes [#10508](pylint-dev/pylint#10508) - Fix a crash in :ref:`nested-min-max` when using `builtins.min` or `builtins.max` instead of `min` or `max` directly. Closes [#10626](pylint-dev/pylint#10626) - Fixed a crash in :ref:`unnecessary-dict-index-lookup` when the index of an enumerated list was deleted inside a for loop. Closes [#10627](pylint-dev/pylint#10627) ## Other Changes - Remove support for launching pylint with Python 3.9. Code that supports Python 3.9 can still be linted with the `--py-version=3.9` setting. Refs [#10405](pylint-dev/pylint#10405) ## Internal Changes - Modified test framework to allow for different test output for different Python versions. Refs [#10382](pylint-dev/pylint#10382) </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/168 Co-authored-by: renovate[bot] <[email protected]> Co-committed-by: renovate[bot] <[email protected]>

jacobtylerwalls added Maintenance Discussion or action around maintaining pylint or the dev workflow python 3.14 Needs astroid update Needs an astroid update (probably a release too) before being mergable labels Jul 28, 2025

jacobtylerwalls added the Blocked 🚧 Blocked by a particular issue label Jul 28, 2025

jacobtylerwalls added this to the 4.0.0 milestone Jul 28, 2025