Audit stdlib object annotations (#9519)

stdlib/multiprocessing/forkserver.pyi

@@ -1,4 +1,4 @@
-from _typeshed import FileDescriptorLike
+from _typeshed import FileDescriptorLike, Unused
 from collections.abc import Sequence
 from struct import Struct
 from typing import Any
@@ -19,7 +19,7 @@ def main(
     alive_r: FileDescriptorLike,
     preload: Sequence[str],
     main_path: str | None = ...,
-    sys_path: object | None = ...,
+    sys_path: Unused = ...,
 ) -> None: ...
 def read_signed(fd: int) -> Any: ...
 def write_signed(fd: int, n: int) -> None: ...

stdlib/multiprocessing/reduction.pyi

@@ -1,6 +1,6 @@
 import pickle
 import sys
-from _typeshed import HasFileno, SupportsWrite
+from _typeshed import HasFileno, SupportsWrite, Unused
 from abc import ABCMeta
 from builtins import type as Type  # alias to avoid name clash
 from collections.abc import Callable
@@ -54,8 +54,7 @@ else:
         ACKNOWLEDGE: Literal[False]
 
     def recvfds(sock: socket, size: int) -> list[int]: ...
-    # destination_pid is unused
-    def send_handle(conn: HasFileno, handle: int, destination_pid: object) -> None: ...
+    def send_handle(conn: HasFileno, handle: int, destination_pid: Unused) -> None: ...
     def recv_handle(conn: HasFileno) -> int: ...
     def sendfds(sock: socket, fds: list[int]) -> None: ...
     def DupFd(fd: int) -> Any: ...  # Return type is really hard to get right
@@ -92,5 +91,4 @@ class AbstractReducer(metaclass=ABCMeta):
         sendfds = _sendfds
         recvfds = _recvfds
         DupFd = _DupFd
-    # *args are unused
-    def __init__(self, *args: object) -> None: ...
+    def __init__(self, *args: Unused) -> None: ...

stdlib/multiprocessing/util.pyi

@@ -1,5 +1,5 @@
 import threading
-from _typeshed import Incomplete, ReadableBuffer, SupportsTrunc
+from _typeshed import Incomplete, ReadableBuffer, SupportsTrunc, Unused
 from collections.abc import Callable, Iterable, Mapping, MutableMapping, Sequence
 from logging import Logger, _Level as _LoggingLevel
 from typing import Any, SupportsInt
@@ -56,7 +56,7 @@ class Finalize:
     ) -> None: ...
     def __call__(
         self,
-        wr: object = ...,
+        wr: Unused = ...,
         _finalizer_registry: MutableMapping[Incomplete, Incomplete] = ...,
         sub_debug: Callable[..., object] = ...,
         getpid: Callable[[], int] = ...,
@@ -70,7 +70,7 @@ class ForkAwareThreadLock:
     acquire: Callable[[bool, float], bool]
     release: Callable[[], None]
     def __enter__(self) -> bool: ...
-    def __exit__(self, *args: object) -> None: ...
+    def __exit__(self, *args: Unused) -> None: ...
 
 class ForkAwareLocal(threading.local): ...