Run mypy and pyright on our py312 stubs in CI (#10119)

.github/workflows/tests.yml

@@ -85,7 +85,7 @@ jobs:
     strategy:
       matrix:
         platform: ["linux", "win32", "darwin"]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12-dev"]
       fail-fast: false
     steps:
       - uses: actions/checkout@v3
@@ -116,7 +116,7 @@ jobs:
     strategy:
       matrix:
         python-platform: ["Linux", "Windows", "Darwin"]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
       fail-fast: false
     steps:
       - uses: actions/checkout@v3

requirements-tests.txt

@@ -1,4 +1,4 @@
-aiohttp==3.8.4
+aiohttp==3.8.4; python_version < "3.12"           # aiohttp can't be installed on 3.12 yet
 black==23.3.0                                     # must match .pre-commit-config.yaml
 flake8==6.0.0; python_version >= "3.8"            # must match .pre-commit-config.yaml
 flake8-bugbear==23.3.23; python_version >= "3.8"  # must match .pre-commit-config.yaml

stdlib/configparser.pyi

@@ -17,7 +17,6 @@ __all__ = [
     "ParsingError",
     "MissingSectionHeaderError",
     "ConfigParser",
-    "SafeConfigParser",
     "RawConfigParser",
     "Interpolation",
     "BasicInterpolation",
@@ -29,6 +28,9 @@ __all__ = [
     "MAX_INTERPOLATION_DEPTH",
 ]
 
+if sys.version_info < (3, 12):
+    __all__ += ["SafeConfigParser"]
+
 _Section: TypeAlias = Mapping[str, str]
 _Parser: TypeAlias = MutableMapping[str, _Section]
 _ConverterCallback: TypeAlias = Callable[[str], Any]

stdlib/itertools.pyi

@@ -272,7 +272,7 @@ if sys.version_info >= (3, 10):
         def __next__(self) -> _T_co: ...
 
 if sys.version_info >= (3, 12):
-    class batched(Iterator[_T_co], Generic[_T_co]):
+    class batched(Iterator[tuple[_T_co, ...]], Generic[_T_co]):
         def __new__(cls, iterable: Iterable[_T_co], n: int) -> Self: ...
         def __iter__(self) -> Self: ...
         def __next__(self) -> tuple[_T_co, ...]: ...

tests/mypy_test.py

@@ -47,7 +47,7 @@ except ImportError:
     print_error("Cannot import mypy. Did you install it?")
     sys.exit(1)
 
-SUPPORTED_VERSIONS = ["3.11", "3.10", "3.9", "3.8", "3.7"]
+SUPPORTED_VERSIONS = ["3.12", "3.11", "3.10", "3.9", "3.8", "3.7"]
 SUPPORTED_PLATFORMS = ("linux", "win32", "darwin")
 DIRECTORIES_TO_TEST = [Path("stdlib"), Path("stubs")]
 
@@ -76,6 +76,13 @@ def valid_path(cmd_arg: str) -> Path:
     return path
 
 
+def remove_dev_suffix(version: str) -> str:
+    """Helper function for argument-parsing"""
+    if version.endswith("-dev"):
+        return version[: -len("-dev")]
+    return version
+
+
 parser = argparse.ArgumentParser(
     description="Typecheck typeshed's stubs with mypy. Patterns are unanchored regexps on the full path."
 )
@@ -105,7 +112,7 @@ parser.add_argument("-v", "--verbose", action="count", default=0, help="More out
 parser.add_argument(
     "-p",
     "--python-version",
-    type=str,
+    type=remove_dev_suffix,
     choices=SUPPORTED_VERSIONS,
     nargs="*",
     action="extend",

tests/regr_test.py

@@ -35,7 +35,7 @@ VENV_DIR = ".venv"
 TYPESHED = "typeshed"
 
 SUPPORTED_PLATFORMS = ["linux", "darwin", "win32"]
-SUPPORTED_VERSIONS = ["3.11", "3.10", "3.9", "3.8", "3.7"]
+SUPPORTED_VERSIONS = ["3.12", "3.11", "3.10", "3.9", "3.8", "3.7"]
 
 
 def package_with_test_cases(package_name: str) -> PackageInfo:

tests/typecheck_typeshed.py

@@ -13,7 +13,7 @@ from utils import colored, print_error
 ReturnCode: TypeAlias = int
 
 SUPPORTED_PLATFORMS = ("linux", "darwin", "win32")
-SUPPORTED_VERSIONS = ("3.11", "3.10", "3.9")
+SUPPORTED_VERSIONS = ("3.12", "3.11", "3.10", "3.9")
 LOWEST_SUPPORTED_VERSION = min(SUPPORTED_VERSIONS, key=lambda x: int(x.split(".")[1]))
 DIRECTORIES_TO_TEST = ("scripts", "tests")
 EMPTY: list[str] = []