asyncio: remove overly specific protocols

stdlib/asyncio/proactor_events.pyi

@@ -1,19 +1,13 @@
 import sys
 from collections.abc import Mapping
 from socket import socket
-from typing import Any, ClassVar, Protocol
+from typing import Any, ClassVar
 from typing_extensions import Literal
 
 from . import base_events, constants, events, futures, streams, transports
 
 __all__ = ("BaseProactorEventLoop",)
 
-if sys.version_info >= (3, 8):
-    class _WarnCallbackProtocol(Protocol):
-        def __call__(
-            self, message: str, category: type[Warning] | None = ..., stacklevel: int = ..., source: Any | None = ...
-        ) -> object: ...
-
 class _ProactorBasePipeTransport(transports._FlowControlMixin, transports.BaseTransport):
     def __init__(
         self,
@@ -24,10 +18,7 @@ class _ProactorBasePipeTransport(transports._FlowControlMixin, transports.BaseTr
         extra: Mapping[Any, Any] | None = None,
         server: events.AbstractServer | None = None,
     ) -> None: ...
-    if sys.version_info >= (3, 8):
-        def __del__(self, _warn: _WarnCallbackProtocol = ...) -> None: ...
-    else:
-        def __del__(self) -> None: ...
+    def __del__(self) -> None: ...
 
 class _ProactorReadPipeTransport(_ProactorBasePipeTransport, transports.ReadTransport):
     if sys.version_info >= (3, 10):

stdlib/asyncio/unix_events.pyi

@@ -84,13 +84,6 @@ if sys.platform != "win32":
     DefaultEventLoopPolicy = _UnixDefaultEventLoopPolicy
 
     if sys.version_info >= (3, 8):
-        from typing import Protocol
-
-        class _Warn(Protocol):
-            def __call__(
-                self, message: str, category: type[Warning] | None = ..., stacklevel: int = ..., source: Any | None = ...
-            ) -> object: ...
-
         class MultiLoopChildWatcher(AbstractChildWatcher):
             def is_active(self) -> bool: ...
             def close(self) -> None: ...
@@ -109,7 +102,7 @@ if sys.platform != "win32":
             def __exit__(
                 self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: types.TracebackType | None
             ) -> None: ...
-            def __del__(self, _warn: _Warn = ...) -> None: ...
+            def __del__(self) -> None: ...
             def add_child_handler(self, pid: int, callback: Callable[..., object], *args: Any) -> None: ...
             def remove_child_handler(self, pid: int) -> bool: ...
             def attach_loop(self, loop: AbstractEventLoop | None) -> None: ...

stdlib/asyncio/windows_utils.pyi

@@ -2,28 +2,20 @@ import subprocess
 import sys
 from collections.abc import Callable
 from types import TracebackType
-from typing import Any, AnyStr, Protocol
+from typing import Any, AnyStr
 from typing_extensions import Literal, Self
 
 if sys.platform == "win32":
     __all__ = ("pipe", "Popen", "PIPE", "PipeHandle")
 
-    class _WarnFunction(Protocol):
-        def __call__(
-            self, message: str, category: type[Warning] = ..., stacklevel: int = ..., source: PipeHandle = ...
-        ) -> object: ...
     BUFSIZE: Literal[8192]
     PIPE = subprocess.PIPE
     STDOUT = subprocess.STDOUT
     def pipe(*, duplex: bool = False, overlapped: tuple[bool, bool] = (True, True), bufsize: int = 8192) -> tuple[int, int]: ...
 
     class PipeHandle:
         def __init__(self, handle: int) -> None: ...
-        if sys.version_info >= (3, 8):
-            def __del__(self, _warn: _WarnFunction = ...) -> None: ...
-        else:
-            def __del__(self) -> None: ...
-
+        def __del__(self) -> None: ...
         def __enter__(self) -> Self: ...
         def __exit__(self, t: type[BaseException] | None, v: BaseException | None, tb: TracebackType | None) -> None: ...
         @property

tests/stubtest_allowlists/darwin.txt

@@ -65,3 +65,8 @@ curses.COLORS  # Initialized after start_color
 curses.COLOR_PAIRS  # Initialized after start_color
 curses.COLS  # Initialized only after initscr call
 curses.LINES  # Initialized only after initscr call
+
+# Takes a "_warn" parameter at runtime
+# for technical reasons; no need to expose it in the stub.
+asyncio.ThreadedChildWatcher.__del__
+asyncio.unix_events.ThreadedChildWatcher.__del__

tests/stubtest_allowlists/linux.txt

@@ -57,3 +57,8 @@ curses.COLORS  # Initialized after start_color
 curses.COLOR_PAIRS  # Initialized after start_color
 curses.COLS  # Initialized only after initscr call
 curses.LINES  # Initialized only after initscr call
+
+# Takes a "_warn" parameter at runtime
+# for technical reasons; no need to expose it in the stub.
+asyncio.ThreadedChildWatcher.__del__
+asyncio.unix_events.ThreadedChildWatcher.__del__

tests/stubtest_allowlists/py3_common.txt

@@ -374,6 +374,10 @@ threading.Condition.release
 multiprocessing.dummy.Condition.acquire
 multiprocessing.dummy.Condition.release
 
+# Takes a "_warn" parameter at runtime
+# for technical reasons; no need to expose it in the stub.
+asyncio.proactor_events._ProactorBasePipeTransport.__del__
+
 # Weird special builtins that are typed as functions, but aren't functions
 builtins.copyright
 builtins.credits

tests/stubtest_allowlists/win32.txt

@@ -60,3 +60,7 @@ pathlib.Path.group
 # but have yet to find their way to all GitHub Actions images
 (sys.get_int_max_str_digits)?
 (sys.set_int_max_str_digits)?
+
+# Takes a "_warn" parameter at runtime
+# for technical reasons; no need to expose it in the stub.
+asyncio.windows_utils.PipeHandle.__del__