Fix type of SSLContext for some static type checkers (#10099)

CHANGES/10099.bugfix.rst

@@ -0,0 +1 @@
+Fixed type of ``SSLContext`` for some static type checkers (e.g. pyright).

CONTRIBUTORS.txt

@@ -9,6 +9,7 @@ Adam Mills
 Adrian Krupa
 Adrián Chaves
 Ahmed Tahri
+Alan Bogarin
 Alan Tse
 Alec Hanefeld
 Alejandro Gómez

aiohttp/client_exceptions.py

@@ -7,13 +7,17 @@
 
 from .typedefs import StrOrURL
 
-try:
+if TYPE_CHECKING:
     import ssl
 
     SSLContext = ssl.SSLContext
-except ImportError:  # pragma: no cover
-    ssl = SSLContext = None  # type: ignore[assignment]
+else:
+    try:
+        import ssl
 
+        SSLContext = ssl.SSLContext
+    except ImportError:  # pragma: no cover
+        ssl = SSLContext = None  # type: ignore[assignment]
 
 if TYPE_CHECKING:
     from .client_reqrep import ClientResponse, ConnectionKey, Fingerprint, RequestInfo

aiohttp/client_reqrep.py

@@ -74,12 +74,16 @@
     RawHeaders,
 )
 
-try:
+if TYPE_CHECKING:
     import ssl
     from ssl import SSLContext
-except ImportError:  # pragma: no cover
-    ssl = None  # type: ignore[assignment]
-    SSLContext = object  # type: ignore[misc,assignment]
+else:
+    try:
+        import ssl
+        from ssl import SSLContext
+    except ImportError:  # pragma: no cover
+        ssl = None  # type: ignore[assignment]
+        SSLContext = object  # type: ignore[misc,assignment]
 
 
 __all__ = ("ClientRequest", "ClientResponse", "RequestInfo", "Fingerprint")

aiohttp/connector.py

@@ -61,14 +61,18 @@
 )
 from .resolver import DefaultResolver
 
-try:
+if TYPE_CHECKING:
     import ssl
 
     SSLContext = ssl.SSLContext
-except ImportError:  # pragma: no cover
-    ssl = None  # type: ignore[assignment]
-    SSLContext = object  # type: ignore[misc,assignment]
-
+else:
+    try:
+        import ssl
+
+        SSLContext = ssl.SSLContext
+    except ImportError:  # pragma: no cover
+        ssl = None  # type: ignore[assignment]
+        SSLContext = object  # type: ignore[misc,assignment]
 
 EMPTY_SCHEMA_SET = frozenset({""})
 HTTP_SCHEMA_SET = frozenset({"http", "https"})

aiohttp/web.py

@@ -9,6 +9,7 @@
 from contextlib import suppress
 from importlib import import_module
 from typing import (
+    TYPE_CHECKING,
     Any,
     Awaitable,
     Callable,
@@ -267,10 +268,13 @@
 )
 
 
-try:
+if TYPE_CHECKING:
     from ssl import SSLContext
-except ImportError:  # pragma: no cover
-    SSLContext = Any  # type: ignore[misc,assignment]
+else:
+    try:
+        from ssl import SSLContext
+    except ImportError:  # pragma: no cover
+        SSLContext = object  # type: ignore[misc,assignment]
 
 # Only display warning when using -Wdefault, -We, -X dev or similar.
 warnings.filterwarnings("ignore", category=NotAppKeyWarning, append=True)

aiohttp/web_runner.py

@@ -2,7 +2,7 @@
 import signal
 import socket
 from abc import ABC, abstractmethod
-from typing import Any, Generic, List, Optional, Set, Type, TypeVar
+from typing import TYPE_CHECKING, Any, Generic, List, Optional, Set, Type, TypeVar
 
 from yarl import URL
 
@@ -16,11 +16,13 @@
 from .web_request import BaseRequest, Request
 from .web_server import Server
 
-try:
+if TYPE_CHECKING:
     from ssl import SSLContext
-except ImportError:
-    SSLContext = object  # type: ignore[misc,assignment]
-
+else:
+    try:
+        from ssl import SSLContext
+    except ImportError:  # pragma: no cover
+        SSLContext = object  # type: ignore[misc,assignment]
 
 __all__ = (
     "BaseSite",

aiohttp/worker.py

@@ -6,7 +6,7 @@
 import signal
 import sys
 from types import FrameType
-from typing import Any, Awaitable, Callable, Optional, Union  # noqa
+from typing import TYPE_CHECKING, Any, Optional
 
 from gunicorn.config import AccessLogFormat as GunicornAccessLogFormat
 from gunicorn.workers import base
@@ -17,13 +17,18 @@
 from .web_app import Application
 from .web_log import AccessLogger
 
-try:
+if TYPE_CHECKING:
     import ssl
 
     SSLContext = ssl.SSLContext
-except ImportError:  # pragma: no cover
-    ssl = None  # type: ignore[assignment]
-    SSLContext = object  # type: ignore[misc,assignment]
+else:
+    try:
+        import ssl
+
+        SSLContext = ssl.SSLContext
+    except ImportError:  # pragma: no cover
+        ssl = None  # type: ignore[assignment]
+        SSLContext = object  # type: ignore[misc,assignment]
 
 
 __all__ = ("GunicornWebWorker", "GunicornUVLoopWebWorker")

docs/spelling_wordlist.txt

@@ -245,6 +245,7 @@ py
 pydantic
 pyenv
 pyflakes
+pyright
 pytest
 Pytest
 Quickstart