Further reduce use of deprecated contextlib aliases (#6370)

stdlib/multiprocessing/managers.pyi

@@ -3,7 +3,8 @@
 import queue
 import sys
 import threading
-from typing import Any, AnyStr, Callable, ContextManager, Generic, Iterable, Mapping, Sequence, Tuple, TypeVar
+from contextlib import AbstractContextManager
+from typing import Any, AnyStr, Callable, Generic, Iterable, Mapping, Sequence, Tuple, TypeVar
 
 from .connection import Connection
 from .context import BaseContext
@@ -71,7 +72,7 @@ class Server:
     def serve_forever(self) -> None: ...
     def accept_connection(self, c: Connection, name: str) -> None: ...
 
-class BaseManager(ContextManager[BaseManager]):
+class BaseManager(AbstractContextManager[BaseManager]):
     def __init__(
         self, address: Any | None = ..., authkey: bytes | None = ..., serializer: str = ..., ctx: BaseContext | None = ...
     ) -> None: ...
@@ -97,7 +98,7 @@ class BaseManager(ContextManager[BaseManager]):
 _dict = dict
 _list = list
 
-class SyncManager(BaseManager, ContextManager[SyncManager]):
+class SyncManager(BaseManager, AbstractContextManager[SyncManager]):
     def BoundedSemaphore(self, value: Any = ...) -> threading.BoundedSemaphore: ...
     def Condition(self, lock: Any = ...) -> threading.Condition: ...
     def Event(self) -> threading.Event: ...

stdlib/multiprocessing/pool.pyi

@@ -1,6 +1,7 @@
 import sys
 from _typeshed import Self
-from typing import Any, Callable, ContextManager, Generic, Iterable, Iterator, List, Mapping, TypeVar
+from contextlib import AbstractContextManager
+from typing import Any, Callable, Generic, Iterable, Iterator, List, Mapping, TypeVar
 
 if sys.version_info >= (3, 9):
     from types import GenericAlias
@@ -62,7 +63,7 @@ class IMapIterator(Iterator[_T]):
 
 class IMapUnorderedIterator(IMapIterator[_T]): ...
 
-class Pool(ContextManager[Pool]):
+class Pool(AbstractContextManager[Pool]):
     def __init__(
         self,
         processes: int | None = ...,
@@ -107,7 +108,7 @@ class Pool(ContextManager[Pool]):
     def join(self) -> None: ...
     def __enter__(self: Self) -> Self: ...
 
-class ThreadPool(Pool, ContextManager[ThreadPool]):
+class ThreadPool(Pool, AbstractContextManager[ThreadPool]):
     def __init__(
         self, processes: int | None = ..., initializer: Callable[..., Any] | None = ..., initargs: Iterable[Any] = ...
     ) -> None: ...

stdlib/multiprocessing/synchronize.pyi

@@ -1,7 +1,8 @@
 import sys
 import threading
+from contextlib import AbstractContextManager
 from multiprocessing.context import BaseContext
-from typing import Any, Callable, ContextManager, Union
+from typing import Any, Callable, Union
 
 _LockLike = Union[Lock, RLock]
 
@@ -13,7 +14,7 @@ class Barrier(threading.Barrier):
 class BoundedSemaphore(Semaphore):
     def __init__(self, value: int = ..., *, ctx: BaseContext) -> None: ...
 
-class Condition(ContextManager[bool]):
+class Condition(AbstractContextManager[bool]):
     def __init__(self, lock: _LockLike | None = ..., *, ctx: BaseContext) -> None: ...
     if sys.version_info >= (3, 7):
         def notify(self, n: int = ...) -> None: ...
@@ -25,7 +26,7 @@ class Condition(ContextManager[bool]):
     def acquire(self, block: bool = ..., timeout: float | None = ...) -> bool: ...
     def release(self) -> None: ...
 
-class Event(ContextManager[bool]):
+class Event(AbstractContextManager[bool]):
     def __init__(self, lock: _LockLike | None = ..., *, ctx: BaseContext) -> None: ...
     def is_set(self) -> bool: ...
     def set(self) -> None: ...
@@ -42,6 +43,6 @@ class Semaphore(SemLock):
     def __init__(self, value: int = ..., *, ctx: BaseContext) -> None: ...
 
 # Not part of public API
-class SemLock(ContextManager[bool]):
+class SemLock(AbstractContextManager[bool]):
     def acquire(self, block: bool = ..., timeout: float | None = ...) -> bool: ...
     def release(self) -> None: ...