[PR #12744/c947145f backport][8.3.x] Replaced typing.Self with typing_extensions.Self

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: "v0.5.2"
+  rev: "v0.6.2"
   hooks:
     - id: ruff
       args: ["--fix"]
@@ -21,7 +21,7 @@ repos:
     hooks:
     -   id: python-use-type-annotations
 -   repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v1.10.1
+    rev: v1.11.2
     hooks:
     -   id: mypy
         files: ^(src/|testing/|scripts/)
@@ -32,19 +32,19 @@ repos:
           - pluggy>=1.5.0
           - packaging
           - tomli
-          - types-pkg_resources
+          - types-setuptools
           - types-tabulate
             # for mypy running on python>=3.11 since exceptiongroup is only a dependency
             # on <3.11
           - exceptiongroup>=1.0.0rc8
 - repo: https://github.com/tox-dev/pyproject-fmt
-  rev: "2.1.4"
+  rev: "2.2.1"
   hooks:
     - id: pyproject-fmt
       # https://pyproject-fmt.readthedocs.io/en/latest/#calculating-max-supported-python-version
       additional_dependencies: ["tox>=4.9"]
 -   repo: https://github.com/asottile/pyupgrade
-    rev: v3.16.0
+    rev: v3.17.0
     hooks:
     -   id: pyupgrade
         stages: [manual]

changelog/12744.bugfix.rst

@@ -0,0 +1 @@
+Fixed typing compatibility with Python 3.9 or less -- replaced `typing.Self` with `typing_extensions.Self` -- by :user:`Avasam`

doc/en/broken-dep-constraints.txt

@@ -3,4 +3,4 @@
 
 # Pin towncrier temporarily due to incompatibility with sphinxcontrib-towncrier:
 # https://github.com/sphinx-contrib/sphinxcontrib-towncrier/issues/92
-towncrier!=24.7.0,!=24.7.1
+towncrier<24.7

src/_pytest/_io/pprint.py

@@ -111,15 +111,15 @@
             p(self, object, stream, indent, allowance, context, level + 1)
             context.remove(objid)
         elif (
-            _dataclasses.is_dataclass(object)
+            _dataclasses.is_dataclass(object)  # type:ignore[unreachable]
             and not isinstance(object, type)
             and object.__dataclass_params__.repr
             and
             # Check dataclass has generated repr method.
             hasattr(object.__repr__, "__wrapped__")
             and "__create_fn__" in object.__repr__.__wrapped__.__qualname__
         ):
-            context.add(objid)
+            context.add(objid)  # type:ignore[unreachable]
             self._pprint_dataclass(
                 object, stream, indent, allowance, context, level + 1
             )

src/_pytest/cacheprovider.py

@@ -369,7 +369,7 @@ def pytest_collectreport(self, report: CollectReport) -> None:
     @hookimpl(wrapper=True, tryfirst=True)
     def pytest_collection_modifyitems(
         self, config: Config, items: list[nodes.Item]
-    ) -> Generator[None, None, None]:
+    ) -> Generator[None]:
         res = yield
 
         if not self.active:
@@ -439,9 +439,7 @@ def __init__(self, config: Config) -> None:
         self.cached_nodeids = set(config.cache.get("cache/nodeids", []))
 
     @hookimpl(wrapper=True, tryfirst=True)
-    def pytest_collection_modifyitems(
-        self, items: list[nodes.Item]
-    ) -> Generator[None, None, None]:
+    def pytest_collection_modifyitems(self, items: list[nodes.Item]) -> Generator[None]:
         res = yield
 
         if self.active:

src/_pytest/capture.py

@@ -135,7 +135,7 @@
 
 
 @hookimpl(wrapper=True)
-def pytest_load_initial_conftests(early_config: Config) -> Generator[None, None, None]:
+def pytest_load_initial_conftests(early_config: Config) -> Generator[None]:
     ns = early_config.known_args_namespace
     if ns.capture == "fd":
         _windowsconsoleio_workaround(sys.stdout)
@@ -202,6 +202,7 @@
 class DontReadFromInput(TextIO):
     @property
     def encoding(self) -> str:
+        assert sys.__stdin__ is not None
         return sys.__stdin__.encoding
 
     def read(self, size: int = -1) -> str:
@@ -817,7 +818,7 @@
     # Helper context managers
 
     @contextlib.contextmanager
-    def global_and_fixture_disabled(self) -> Generator[None, None, None]:
+    def global_and_fixture_disabled(self) -> Generator[None]:
         """Context manager to temporarily disable global and current fixture capturing."""
         do_fixture = self._capture_fixture and self._capture_fixture._is_started()
         if do_fixture:
@@ -834,7 +835,7 @@
                 self.resume_fixture()
 
     @contextlib.contextmanager
-    def item_capture(self, when: str, item: Item) -> Generator[None, None, None]:
+    def item_capture(self, when: str, item: Item) -> Generator[None]:
         self.resume_global_capture()
         self.activate_fixture()
         try:
@@ -869,17 +870,17 @@
         return rep
 
     @hookimpl(wrapper=True)
-    def pytest_runtest_setup(self, item: Item) -> Generator[None, None, None]:
+    def pytest_runtest_setup(self, item: Item) -> Generator[None]:
         with self.item_capture("setup", item):
             return (yield)
 
     @hookimpl(wrapper=True)
-    def pytest_runtest_call(self, item: Item) -> Generator[None, None, None]:
+    def pytest_runtest_call(self, item: Item) -> Generator[None]:
         with self.item_capture("call", item):
             return (yield)
 
     @hookimpl(wrapper=True)
-    def pytest_runtest_teardown(self, item: Item) -> Generator[None, None, None]:
+    def pytest_runtest_teardown(self, item: Item) -> Generator[None]:
         with self.item_capture("teardown", item):
             return (yield)
 
@@ -961,7 +962,7 @@
         return False
 
     @contextlib.contextmanager
-    def disabled(self) -> Generator[None, None, None]:
+    def disabled(self) -> Generator[None]:
         """Temporarily disable capturing while inside the ``with`` block."""
         capmanager: CaptureManager = self.request.config.pluginmanager.getplugin(
             "capturemanager"
@@ -974,7 +975,7 @@
 
 
 @fixture
-def capsys(request: SubRequest) -> Generator[CaptureFixture[str], None, None]:
+def capsys(request: SubRequest) -> Generator[CaptureFixture[str]]:
     r"""Enable text capturing of writes to ``sys.stdout`` and ``sys.stderr``.
 
     The captured output is made available via ``capsys.readouterr()`` method
@@ -1002,7 +1003,7 @@
 
 
 @fixture
-def capsysbinary(request: SubRequest) -> Generator[CaptureFixture[bytes], None, None]:
+def capsysbinary(request: SubRequest) -> Generator[CaptureFixture[bytes]]:
     r"""Enable bytes capturing of writes to ``sys.stdout`` and ``sys.stderr``.
 
     The captured output is made available via ``capsysbinary.readouterr()``
@@ -1030,7 +1031,7 @@
 
 
 @fixture
-def capfd(request: SubRequest) -> Generator[CaptureFixture[str], None, None]:
+def capfd(request: SubRequest) -> Generator[CaptureFixture[str]]:
     r"""Enable text capturing of writes to file descriptors ``1`` and ``2``.
 
     The captured output is made available via ``capfd.readouterr()`` method
@@ -1058,7 +1059,7 @@
 
 
 @fixture
-def capfdbinary(request: SubRequest) -> Generator[CaptureFixture[bytes], None, None]:
+def capfdbinary(request: SubRequest) -> Generator[CaptureFixture[bytes]]:
     r"""Enable bytes capturing of writes to file descriptors ``1`` and ``2``.
 
     The captured output is made available via ``capfd.readouterr()`` method

src/_pytest/doctest.py

@@ -44,7 +44,8 @@
 
 if TYPE_CHECKING:
     import doctest
-    from typing import Self
+
+    from typing_extensions import Self
 
 DOCTEST_REPORT_CHOICE_NONE = "none"
 DOCTEST_REPORT_CHOICE_CDIFF = "cdiff"
@@ -467,7 +468,7 @@ def _is_mocked(obj: object) -> bool:
 
 
 @contextmanager
-def _patch_unwrap_mock_aware() -> Generator[None, None, None]:
+def _patch_unwrap_mock_aware() -> Generator[None]:
     """Context manager which replaces ``inspect.unwrap`` with a version
     that's aware of mock objects and doesn't recurse into them."""
     real_unwrap = inspect.unwrap

src/_pytest/faulthandler.py

@@ -64,6 +64,7 @@ def get_stderr_fileno() -> int:
         # pytest-xdist monkeypatches sys.stderr with an object that is not an actual file.
         # https://docs.python.org/3/library/faulthandler.html#issue-with-file-descriptors
         # This is potentially dangerous, but the best we can do.
+        assert sys.__stderr__ is not None
         return sys.__stderr__.fileno()
 
 

src/_pytest/logging.py

@@ -554,9 +554,7 @@ def set_level(self, level: int | str, logger: str | None = None) -> None:
             self._initial_disabled_logging_level = initial_disabled_logging_level
 
     @contextmanager
-    def at_level(
-        self, level: int | str, logger: str | None = None
-    ) -> Generator[None, None, None]:
+    def at_level(self, level: int | str, logger: str | None = None) -> Generator[None]:
         """Context manager that sets the level for capturing of logs. After
         the end of the 'with' statement the level is restored to its original
         value.
@@ -580,7 +578,7 @@ def at_level(
             logging.disable(original_disable_level)
 
     @contextmanager
-    def filtering(self, filter_: logging.Filter) -> Generator[None, None, None]:
+    def filtering(self, filter_: logging.Filter) -> Generator[None]:
         """Context manager that temporarily adds the given filter to the caplog's
         :meth:`handler` for the 'with' statement block, and removes that filter at the
         end of the block.
@@ -597,7 +595,7 @@ def filtering(self, filter_: logging.Filter) -> Generator[None, None, None]:
 
 
 @fixture
-def caplog(request: FixtureRequest) -> Generator[LogCaptureFixture, None, None]:
+def caplog(request: FixtureRequest) -> Generator[LogCaptureFixture]:
     """Access and control log capturing.
 
     Captured logs are available through the following properties/methods::
@@ -776,15 +774,15 @@ def _log_cli_enabled(self) -> bool:
         return True
 
     @hookimpl(wrapper=True, tryfirst=True)
-    def pytest_sessionstart(self) -> Generator[None, None, None]:
+    def pytest_sessionstart(self) -> Generator[None]:
         self.log_cli_handler.set_when("sessionstart")
 
         with catching_logs(self.log_cli_handler, level=self.log_cli_level):
             with catching_logs(self.log_file_handler, level=self.log_file_level):
                 return (yield)
 
     @hookimpl(wrapper=True, tryfirst=True)
-    def pytest_collection(self) -> Generator[None, None, None]:
+    def pytest_collection(self) -> Generator[None]:
         self.log_cli_handler.set_when("collection")
 
         with catching_logs(self.log_cli_handler, level=self.log_cli_level):
@@ -813,7 +811,7 @@ def pytest_runtest_logstart(self) -> None:
     def pytest_runtest_logreport(self) -> None:
         self.log_cli_handler.set_when("logreport")
 
-    def _runtest_for(self, item: nodes.Item, when: str) -> Generator[None, None, None]:
+    def _runtest_for(self, item: nodes.Item, when: str) -> Generator[None]:
         """Implement the internals of the pytest_runtest_xxx() hooks."""
         with catching_logs(
             self.caplog_handler,
@@ -834,21 +832,21 @@ def _runtest_for(self, item: nodes.Item, when: str) -> Generator[None, None, Non
                 item.add_report_section(when, "log", log)
 
     @hookimpl(wrapper=True)
-    def pytest_runtest_setup(self, item: nodes.Item) -> Generator[None, None, None]:
+    def pytest_runtest_setup(self, item: nodes.Item) -> Generator[None]:
         self.log_cli_handler.set_when("setup")
 
         empty: dict[str, list[logging.LogRecord]] = {}
         item.stash[caplog_records_key] = empty
         yield from self._runtest_for(item, "setup")
 
     @hookimpl(wrapper=True)
-    def pytest_runtest_call(self, item: nodes.Item) -> Generator[None, None, None]:
+    def pytest_runtest_call(self, item: nodes.Item) -> Generator[None]:
         self.log_cli_handler.set_when("call")
 
         yield from self._runtest_for(item, "call")
 
     @hookimpl(wrapper=True)
-    def pytest_runtest_teardown(self, item: nodes.Item) -> Generator[None, None, None]:
+    def pytest_runtest_teardown(self, item: nodes.Item) -> Generator[None]:
         self.log_cli_handler.set_when("teardown")
 
         try:
@@ -862,7 +860,7 @@ def pytest_runtest_logfinish(self) -> None:
         self.log_cli_handler.set_when("finish")
 
     @hookimpl(wrapper=True, tryfirst=True)
-    def pytest_sessionfinish(self) -> Generator[None, None, None]:
+    def pytest_sessionfinish(self) -> Generator[None]:
         self.log_cli_handler.set_when("sessionfinish")
 
         with catching_logs(self.log_cli_handler, level=self.log_cli_level):

src/_pytest/monkeypatch.py

@@ -28,7 +28,7 @@
 
 
 @fixture
-def monkeypatch() -> Generator[MonkeyPatch, None, None]:
+def monkeypatch() -> Generator[MonkeyPatch]:
     """A convenient fixture for monkey-patching.
 
     The fixture provides these methods to modify objects, dictionaries, or
@@ -135,7 +135,7 @@ def __init__(self) -> None:
 
     @classmethod
     @contextmanager
-    def context(cls) -> Generator[MonkeyPatch, None, None]:
+    def context(cls) -> Generator[MonkeyPatch]:
         """Context manager that returns a new :class:`MonkeyPatch` object
         which undoes any patching done inside the ``with`` block upon exit.
 

src/_pytest/nodes.py

@@ -43,7 +43,7 @@
 
 
 if TYPE_CHECKING:
-    from typing import Self
+    from typing_extensions import Self
 
     # Imported here due to circular import.
     from _pytest.main import Session

src/_pytest/pytester.py

@@ -491,7 +491,7 @@ def pytester(
 
 
 @fixture
-def _sys_snapshot() -> Generator[None, None, None]:
+def _sys_snapshot() -> Generator[None]:
     snappaths = SysPathsSnapshot()
     snapmods = SysModulesSnapshot()
     yield
@@ -500,7 +500,7 @@ def _sys_snapshot() -> Generator[None, None, None]:
 
 
 @fixture
-def _config_for_test() -> Generator[Config, None, None]:
+def _config_for_test() -> Generator[Config]:
     from _pytest.config import get_config
 
     config = get_config()

src/_pytest/python.py

@@ -78,7 +78,7 @@
 
 
 if TYPE_CHECKING:
-    from typing import Self
+    from typing_extensions import Self
 
 
 def pytest_addoption(parser: Parser) -> None:
@@ -568,7 +568,7 @@
         if setup_module is None and teardown_module is None:
             return
 
-        def xunit_setup_module_fixture(request) -> Generator[None, None, None]:
+        def xunit_setup_module_fixture(request) -> Generator[None]:
             module = request.module
             if setup_module is not None:
                 _call_with_optional_argument(setup_module, module)
@@ -599,7 +599,7 @@
         if setup_function is None and teardown_function is None:
             return
 
-        def xunit_setup_function_fixture(request) -> Generator[None, None, None]:
+        def xunit_setup_function_fixture(request) -> Generator[None]:
             if request.instance is not None:
                 # in this case we are bound to an instance, so we need to let
                 # setup_method handle this
@@ -780,7 +780,7 @@
         if setup_class is None and teardown_class is None:
             return
 
-        def xunit_setup_class_fixture(request) -> Generator[None, None, None]:
+        def xunit_setup_class_fixture(request) -> Generator[None]:
             cls = request.cls
             if setup_class is not None:
                 func = getimfunc(setup_class)
@@ -813,7 +813,7 @@
         if setup_method is None and teardown_method is None:
             return
 
-        def xunit_setup_method_fixture(request) -> Generator[None, None, None]:
+        def xunit_setup_method_fixture(request) -> Generator[None]:
             instance = request.instance
             method = request.function
             if setup_method is not None: