contextvars, pycurl: make classes final (#7334)

stubs/contextvars/contextvars.pyi

@@ -1,6 +1,6 @@
 import sys
 from typing import Any, Callable, ClassVar, Generic, Iterator, Mapping, TypeVar
-from typing_extensions import ParamSpec
+from typing_extensions import ParamSpec, final
 
 if sys.version_info >= (3, 9):
     from types import GenericAlias
@@ -8,6 +8,7 @@ if sys.version_info >= (3, 9):
 _T = TypeVar("_T")
 _P = ParamSpec("_P")
 
+@final
 class ContextVar(Generic[_T]):
     def __init__(self, name: str, *, default: _T = ...) -> None: ...
     @property
@@ -18,6 +19,7 @@ class ContextVar(Generic[_T]):
     if sys.version_info >= (3, 9):
         def __class_getitem__(cls, item: Any) -> GenericAlias: ...
 
+@final
 class Token(Generic[_T]):
     @property
     def var(self) -> ContextVar[_T]: ...
@@ -31,6 +33,7 @@ def copy_context() -> Context: ...
 
 # It doesn't make sense to make this generic, because for most Contexts each ContextVar will have
 # a different value.
+@final
 class Context(Mapping[ContextVar[Any], Any]):
     def __init__(self) -> None: ...
     def run(self, callable: Callable[_P, _T], *args: _P.args, **kwargs: _P.kwargs) -> _T: ...

stubs/pycurl/pycurl.pyi

@@ -1,6 +1,5 @@
-# TODO(MichalPokorny): more precise types
-
 from typing import Any, Text
+from typing_extensions import final
 
 GLOBAL_ACK_EINTR: int
 GLOBAL_ALL: int
@@ -18,6 +17,7 @@ def version_info() -> tuple[int, str, int, str, int, str, int, str, tuple[str, .
 
 class error(Exception): ...
 
+@final
 class Curl:
     def close(self) -> None: ...
     def setopt(self, option: int, value: Any) -> None: ...
@@ -34,6 +34,7 @@ class Curl:
     # TODO(MichalPokorny): wat?
     USERPWD: int
 
+@final
 class CurlMulti:
     def close(self) -> None: ...
     def add_handle(self, obj: Curl) -> None: ...
@@ -44,6 +45,7 @@ class CurlMulti:
     def info_read(self, max_objects: int = ...) -> tuple[int, list[Any], list[Any]]: ...
     def socket_action(self, sockfd: int, ev_bitmask: int) -> tuple[int, int]: ...
 
+@final
 class CurlShare:
     def close(self) -> None: ...
     def setopt(self, option: int, value: Any) -> Any: ...