Use typing_extensions.Self in the stdlib (#9694)

stdlib/multiprocessing/connection.pyi

@@ -1,10 +1,10 @@
 import socket
 import sys
 import types
-from _typeshed import ReadableBuffer, Self
+from _typeshed import ReadableBuffer
 from collections.abc import Iterable
 from typing import Any
-from typing_extensions import SupportsIndex, TypeAlias
+from typing_extensions import Self, SupportsIndex, TypeAlias
 
 __all__ = ["Client", "Listener", "Pipe", "wait"]
 
@@ -27,7 +27,7 @@ class _ConnectionBase:
     def recv_bytes_into(self, buf: Any, offset: int = 0) -> int: ...
     def recv(self) -> Any: ...
     def poll(self, timeout: float | None = 0.0) -> bool: ...
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_value: BaseException | None, exc_tb: types.TracebackType | None
     ) -> None: ...
@@ -47,7 +47,7 @@ class Listener:
     def address(self) -> _Address: ...
     @property
     def last_accepted(self) -> _Address | None: ...
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_value: BaseException | None, exc_tb: types.TracebackType | None
     ) -> None: ...

stdlib/multiprocessing/dummy/connection.pyi

@@ -1,8 +1,7 @@
-from _typeshed import Self
 from queue import Queue
 from types import TracebackType
 from typing import Any
-from typing_extensions import TypeAlias
+from typing_extensions import Self, TypeAlias
 
 __all__ = ["Client", "Listener", "Pipe"]
 
@@ -17,7 +16,7 @@ class Connection:
     recv_bytes: Any
     send: Any
     send_bytes: Any
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_value: BaseException | None, exc_tb: TracebackType | None
     ) -> None: ...
@@ -29,7 +28,7 @@ class Listener:
     _backlog_queue: Queue[Any] | None
     @property
     def address(self) -> Queue[Any] | None: ...
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_value: BaseException | None, exc_tb: TracebackType | None
     ) -> None: ...

stdlib/multiprocessing/managers.pyi

@@ -1,11 +1,11 @@
 import queue
 import sys
 import threading
-from _typeshed import Self, SupportsKeysAndGetItem, SupportsRichComparison, SupportsRichComparisonT
+from _typeshed import SupportsKeysAndGetItem, SupportsRichComparison, SupportsRichComparisonT
 from collections.abc import Callable, Iterable, Iterator, Mapping, MutableMapping, MutableSequence, Sequence
 from types import TracebackType
 from typing import Any, AnyStr, ClassVar, Generic, TypeVar, overload
-from typing_extensions import SupportsIndex, TypeAlias
+from typing_extensions import Self, SupportsIndex, TypeAlias
 
 from .connection import Connection
 from .context import BaseContext
@@ -116,8 +116,8 @@ class BaseListProxy(BaseProxy, MutableSequence[_T]):
     def sort(self, *, key: Callable[[_T], SupportsRichComparison], reverse: bool = ...) -> None: ...
 
 class ListProxy(BaseListProxy[_T]):
-    def __iadd__(self: Self, __x: Iterable[_T]) -> Self: ...  # type: ignore[override]
-    def __imul__(self: Self, __n: SupportsIndex) -> Self: ...  # type: ignore[override]
+    def __iadd__(self, __x: Iterable[_T]) -> Self: ...  # type: ignore[override]
+    def __imul__(self, __n: SupportsIndex) -> Self: ...  # type: ignore[override]
 
 # Returned by BaseManager.get_server()
 class Server:
@@ -165,7 +165,7 @@ class BaseManager:
         method_to_typeid: Mapping[str, str] | None = None,
         create_method: bool = True,
     ) -> None: ...
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: TracebackType | None
     ) -> None: ...

stdlib/multiprocessing/pool.pyi

@@ -1,9 +1,8 @@
 import sys
-from _typeshed import Self
 from collections.abc import Callable, Iterable, Iterator, Mapping
 from types import TracebackType
 from typing import Any, Generic, TypeVar
-from typing_extensions import Literal
+from typing_extensions import Literal, Self
 
 if sys.version_info >= (3, 9):
     from types import GenericAlias
@@ -62,7 +61,7 @@ class IMapIterator(Iterator[_T]):
     else:
         def __init__(self, cache: dict[int, IMapIterator[Any]]) -> None: ...
 
-    def __iter__(self: Self) -> Self: ...
+    def __iter__(self) -> Self: ...
     def next(self, timeout: float | None = None) -> _T: ...
     def __next__(self, timeout: float | None = None) -> _T: ...
 
@@ -109,7 +108,7 @@ class Pool:
     def close(self) -> None: ...
     def terminate(self) -> None: ...
     def join(self) -> None: ...
-    def __enter__(self: Self) -> Self: ...
+    def __enter__(self) -> Self: ...
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: TracebackType | None
     ) -> None: ...

stdlib/multiprocessing/shared_memory.pyi

@@ -1,7 +1,7 @@
 import sys
-from _typeshed import Self
 from collections.abc import Iterable
 from typing import Any, Generic, TypeVar, overload
+from typing_extensions import Self
 
 if sys.version_info >= (3, 9):
     from types import GenericAlias
@@ -29,7 +29,7 @@ class ShareableList(Generic[_SLT]):
     def __init__(self, sequence: Iterable[_SLT], *, name: str | None = None) -> None: ...
     def __getitem__(self, position: int) -> _SLT: ...
     def __setitem__(self, position: int, value: _SLT) -> None: ...
-    def __reduce__(self: Self) -> tuple[Self, tuple[_SLT, ...]]: ...
+    def __reduce__(self) -> tuple[Self, tuple[_SLT, ...]]: ...
     def __len__(self) -> int: ...
     @property
     def format(self) -> str: ...