stdlib: audit more callback annotations

stdlib/_dummy_thread.pyi

@@ -11,7 +11,7 @@ if sys.version_info >= (3, 7):
 TIMEOUT_MAX: int
 error = RuntimeError
 
-def start_new_thread(function: Callable[..., Any], args: tuple[Any, ...], kwargs: dict[str, Any] = ...) -> None: ...
+def start_new_thread(function: Callable[..., object], args: tuple[Any, ...], kwargs: dict[str, Any] = ...) -> None: ...
 def exit() -> NoReturn: ...
 def get_ident() -> int: ...
 def allocate_lock() -> LockType: ...

stdlib/_dummy_threading.pyi

@@ -60,7 +60,7 @@ class Thread:
     def __init__(
         self,
         group: None = ...,
-        target: Callable[..., Any] | None = ...,
+        target: Callable[..., object] | None = ...,
         name: str | None = ...,
         args: Iterable[Any] = ...,
         kwargs: Mapping[str, Any] | None = ...,
@@ -151,7 +151,7 @@ class Timer(Thread):
     def __init__(
         self,
         interval: float,
-        function: Callable[..., Any],
+        function: Callable[..., object],
         args: Iterable[Any] | None = ...,
         kwargs: Mapping[str, Any] | None = ...,
     ) -> None: ...

stdlib/_thread.pyi

@@ -19,7 +19,7 @@ class LockType:
         self, type: type[BaseException] | None, value: BaseException | None, traceback: TracebackType | None
     ) -> None: ...
 
-def start_new_thread(function: Callable[..., Any], args: tuple[Any, ...], kwargs: dict[str, Any] = ...) -> int: ...
+def start_new_thread(function: Callable[..., object], args: tuple[Any, ...], kwargs: dict[str, Any] = ...) -> int: ...
 def interrupt_main() -> None: ...
 def exit() -> NoReturn: ...
 def allocate_lock() -> LockType: ...

stdlib/atexit.pyi

@@ -1,5 +1,5 @@
 from collections.abc import Callable
-from typing import Any, TypeVar
+from typing import TypeVar
 from typing_extensions import ParamSpec
 
 _T = TypeVar("_T")
@@ -9,4 +9,4 @@ def _clear() -> None: ...
 def _ncallbacks() -> int: ...
 def _run_exitfuncs() -> None: ...
 def register(func: Callable[_P, _T], *args: _P.args, **kwargs: _P.kwargs) -> Callable[_P, _T]: ...
-def unregister(func: Callable[..., Any]) -> None: ...
+def unregister(func: Callable[..., object]) -> None: ...

stdlib/bdb.pyi

@@ -1,15 +1,14 @@
 import sys
-from _typeshed import ExcInfo
+from _typeshed import ExcInfo, TraceFunction
 from collections.abc import Callable, Iterable, Mapping
 from types import CodeType, FrameType, TracebackType
 from typing import IO, Any, SupportsInt, TypeVar
-from typing_extensions import Literal, ParamSpec, TypeAlias
+from typing_extensions import Literal, ParamSpec
 
 __all__ = ["BdbQuit", "Bdb", "Breakpoint"]
 
 _T = TypeVar("_T")
 _P = ParamSpec("_P")
-_TraceDispatch: TypeAlias = Callable[[FrameType, str, Any], Any]  # TODO: Recursive type
 
 GENERATOR_AND_COROUTINE_FLAGS: Literal[672]
 
@@ -28,11 +27,11 @@ class Bdb:
     def __init__(self, skip: Iterable[str] | None = ...) -> None: ...
     def canonic(self, filename: str) -> str: ...
     def reset(self) -> None: ...
-    def trace_dispatch(self, frame: FrameType, event: str, arg: Any) -> _TraceDispatch: ...
-    def dispatch_line(self, frame: FrameType) -> _TraceDispatch: ...
-    def dispatch_call(self, frame: FrameType, arg: None) -> _TraceDispatch: ...
-    def dispatch_return(self, frame: FrameType, arg: Any) -> _TraceDispatch: ...
-    def dispatch_exception(self, frame: FrameType, arg: ExcInfo) -> _TraceDispatch: ...
+    def trace_dispatch(self, frame: FrameType, event: str, arg: Any) -> TraceFunction: ...
+    def dispatch_line(self, frame: FrameType) -> TraceFunction: ...
+    def dispatch_call(self, frame: FrameType, arg: None) -> TraceFunction: ...
+    def dispatch_return(self, frame: FrameType, arg: Any) -> TraceFunction: ...
+    def dispatch_exception(self, frame: FrameType, arg: ExcInfo) -> TraceFunction: ...
     def is_skipped_module(self, module_name: str) -> bool: ...
     def stop_here(self, frame: FrameType) -> bool: ...
     def break_here(self, frame: FrameType) -> bool: ...

stdlib/concurrent/futures/_base.pyi

@@ -50,7 +50,7 @@ class Future(Generic[_T]):
     def cancelled(self) -> bool: ...
     def running(self) -> bool: ...
     def done(self) -> bool: ...
-    def add_done_callback(self, fn: Callable[[Future[_T]], Any]) -> None: ...
+    def add_done_callback(self, fn: Callable[[Future[_T]], object]) -> None: ...
     def result(self, timeout: float | None = ...) -> _T: ...
     def set_running_or_notify_cancel(self) -> bool: ...
     def set_result(self, result: _T) -> None: ...

stdlib/concurrent/futures/process.pyi

@@ -10,6 +10,8 @@ from weakref import ref
 
 from ._base import Executor, Future
 
+_T = TypeVar("_T")
+
 _threads_wakeups: MutableMapping[Any, Any]
 _global_shutdown: bool
 
@@ -40,14 +42,12 @@ class _ExceptionWithTraceback:
 
 def _rebuild_exc(exc: Exception, tb: str) -> Exception: ...
 
-_S = TypeVar("_S")
-
-class _WorkItem(Generic[_S]):
-    future: Future[_S]
-    fn: Callable[..., _S]
+class _WorkItem(Generic[_T]):
+    future: Future[_T]
+    fn: Callable[..., _T]
     args: Iterable[Any]
     kwargs: Mapping[str, Any]
-    def __init__(self, future: Future[_S], fn: Callable[..., _S], args: Iterable[Any], kwargs: Mapping[str, Any]) -> None: ...
+    def __init__(self, future: Future[_T], fn: Callable[..., _T], args: Iterable[Any], kwargs: Mapping[str, Any]) -> None: ...
 
 class _ResultItem:
     work_id: int
@@ -91,7 +91,7 @@ if sys.version_info >= (3, 7):
         def _on_queue_feeder_error(self, e: Exception, obj: _CallItem) -> None: ...
 
 def _get_chunks(*iterables: Any, chunksize: int) -> Generator[tuple[Any, ...], None, None]: ...
-def _process_chunk(fn: Callable[..., Any], chunk: tuple[Any, None, None]) -> Generator[Any, None, None]: ...
+def _process_chunk(fn: Callable[..., _T], chunk: Iterable[tuple[Any, ...]]) -> list[_T]: ...
 
 if sys.version_info >= (3, 11):
     def _sendback_result(

stdlib/distutils/cmd.pyi

@@ -25,7 +25,7 @@ class Command:
     def run_command(self, command: str) -> None: ...
     def get_sub_commands(self) -> list[str]: ...
     def warn(self, msg: str) -> None: ...
-    def execute(self, func: Callable[..., Any], args: Iterable[Any], msg: str | None = ..., level: int = ...) -> None: ...
+    def execute(self, func: Callable[..., object], args: Iterable[Any], msg: str | None = ..., level: int = ...) -> None: ...
     def mkpath(self, name: str, mode: int = ...) -> None: ...
     def copy_file(
         self,
@@ -60,7 +60,7 @@ class Command:
         self,
         infiles: str | list[str] | tuple[str, ...],
         outfile: str,
-        func: Callable[..., Any],
+        func: Callable[..., object],
         args: list[Any],
         exec_msg: str | None = ...,
         skip_msg: str | None = ...,

stdlib/doctest.pyi

@@ -126,7 +126,7 @@ class DocTestFinder:
         extraglobs: dict[str, Any] | None = ...,
     ) -> list[DocTest]: ...
 
-_Out: TypeAlias = Callable[[str], Any]
+_Out: TypeAlias = Callable[[str], object]
 
 class DocTestRunner:
     DIVIDER: str
@@ -201,8 +201,8 @@ class DocTestCase(unittest.TestCase):
         self,
         test: DocTest,
         optionflags: int = ...,
-        setUp: Callable[[DocTest], Any] | None = ...,
-        tearDown: Callable[[DocTest], Any] | None = ...,
+        setUp: Callable[[DocTest], object] | None = ...,
+        tearDown: Callable[[DocTest], object] | None = ...,
         checker: OutputChecker | None = ...,
     ) -> None: ...
     def setUp(self) -> None: ...

stdlib/ftplib.pyi

@@ -90,22 +90,22 @@ class FTP:
     def ntransfercmd(self, cmd: str, rest: int | str | None = ...) -> tuple[socket, int]: ...
     def transfercmd(self, cmd: str, rest: int | str | None = ...) -> socket: ...
     def retrbinary(
-        self, cmd: str, callback: Callable[[bytes], Any], blocksize: int = ..., rest: int | str | None = ...
+        self, cmd: str, callback: Callable[[bytes], object], blocksize: int = ..., rest: int | str | None = ...
     ) -> str: ...
     def storbinary(
         self,
         cmd: str,
         fp: SupportsRead[bytes],
         blocksize: int = ...,
-        callback: Callable[[bytes], Any] | None = ...,
+        callback: Callable[[bytes], object] | None = ...,
         rest: int | str | None = ...,
     ) -> str: ...
-    def retrlines(self, cmd: str, callback: Callable[[str], Any] | None = ...) -> str: ...
-    def storlines(self, cmd: str, fp: SupportsReadline[bytes], callback: Callable[[bytes], Any] | None = ...) -> str: ...
+    def retrlines(self, cmd: str, callback: Callable[[str], object] | None = ...) -> str: ...
+    def storlines(self, cmd: str, fp: SupportsReadline[bytes], callback: Callable[[bytes], object] | None = ...) -> str: ...
     def acct(self, password: str) -> str: ...
     def nlst(self, *args: str) -> list[str]: ...
     # Technically only the last arg can be a Callable but ...
-    def dir(self, *args: str | Callable[[str], None]) -> None: ...
+    def dir(self, *args: str | Callable[[str], object]) -> None: ...
     def mlsd(self, path: str = ..., facts: Iterable[str] = ...) -> Iterator[tuple[str, dict[str, str]]]: ...
     def rename(self, fromname: str, toname: str) -> str: ...
     def delete(self, filename: str) -> str: ...

stdlib/functools.pyi

@@ -28,7 +28,7 @@ if sys.version_info >= (3, 8):
 if sys.version_info >= (3, 9):
     __all__ += ["cache"]
 
-_AnyCallable: TypeAlias = Callable[..., Any]
+_AnyCallable: TypeAlias = Callable[..., object]
 
 _T = TypeVar("_T")
 _S = TypeVar("_S")

stdlib/heapq.pyi

@@ -9,7 +9,9 @@ _S = TypeVar("_S")
 
 __about__: str
 
-def merge(*iterables: Iterable[_S], key: Callable[[_S], Any] | None = ..., reverse: bool = ...) -> Iterable[_S]: ...
+def merge(
+    *iterables: Iterable[_S], key: Callable[[_S], SupportsRichComparison] | None = ..., reverse: bool = ...
+) -> Iterable[_S]: ...
 def nlargest(n: int, iterable: Iterable[_S], key: Callable[[_S], SupportsRichComparison] | None = ...) -> list[_S]: ...
 def nsmallest(n: int, iterable: Iterable[_S], key: Callable[[_S], SupportsRichComparison] | None = ...) -> list[_S]: ...
 def _heapify_max(__x: list[Any]) -> None: ...  # undocumented

stdlib/lib2to3/pytree.pyi

@@ -8,6 +8,8 @@ _NL: TypeAlias = Node | Leaf
 _Context: TypeAlias = tuple[str, int, int]
 _Results: TypeAlias = dict[str, _NL]
 _RawNode: TypeAlias = tuple[int, str, _Context, list[_NL] | None]
+# This alias isn't used in this file,
+# but is imported in other lib2to3 submodules
 _Convert: TypeAlias = Callable[[Grammar, _RawNode], Any]
 
 HUGE: int

stdlib/os/__init__.pyi

@@ -776,7 +776,7 @@ def utime(
     follow_symlinks: bool = ...,
 ) -> None: ...
 
-_OnError: TypeAlias = Callable[[OSError], Any]
+_OnError: TypeAlias = Callable[[OSError], object]
 
 def walk(
     top: GenericPath[AnyStr], topdown: bool = ..., onerror: _OnError | None = ..., followlinks: bool = ...
@@ -1011,7 +1011,7 @@ if sys.version_info >= (3, 8):
     if sys.platform == "win32":
         class _AddedDllDirectory:
             path: str | None
-            def __init__(self, path: str | None, cookie: _T, remove_dll_directory: Callable[[_T], Any]) -> None: ...
+            def __init__(self, path: str | None, cookie: _T, remove_dll_directory: Callable[[_T], object]) -> None: ...
             def close(self) -> None: ...
             def __enter__(self: Self) -> Self: ...
             def __exit__(self, *args: object) -> None: ...

stdlib/sched.pyi

@@ -1,23 +1,26 @@
 import sys
 from collections.abc import Callable
 from typing import Any, NamedTuple
+from typing_extensions import TypeAlias
 
 __all__ = ["scheduler"]
 
+_ActionCallback: TypeAlias = Callable[..., Any]
+
 if sys.version_info >= (3, 10):
     class Event(NamedTuple):
         time: float
         priority: Any
         sequence: int
-        action: Callable[..., Any]
+        action: _ActionCallback
         argument: tuple[Any, ...]
         kwargs: dict[str, Any]
 
 else:
     class Event(NamedTuple):
         time: float
         priority: Any
-        action: Callable[..., Any]
+        action: _ActionCallback
         argument: tuple[Any, ...]
         kwargs: dict[str, Any]
 
@@ -27,20 +30,10 @@ class scheduler:
 
     def __init__(self, timefunc: Callable[[], float] = ..., delayfunc: Callable[[float], object] = ...) -> None: ...
     def enterabs(
-        self,
-        time: float,
-        priority: Any,
-        action: Callable[..., Any],
-        argument: tuple[Any, ...] = ...,
-        kwargs: dict[str, Any] = ...,
+        self, time: float, priority: Any, action: _ActionCallback, argument: tuple[Any, ...] = ..., kwargs: dict[str, Any] = ...
     ) -> Event: ...
     def enter(
-        self,
-        delay: float,
-        priority: Any,
-        action: Callable[..., Any],
-        argument: tuple[Any, ...] = ...,
-        kwargs: dict[str, Any] = ...,
+        self, delay: float, priority: Any, action: _ActionCallback, argument: tuple[Any, ...] = ..., kwargs: dict[str, Any] = ...
     ) -> Event: ...
     def run(self, blocking: bool = ...) -> float | None: ...
     def cancel(self, event: Event) -> None: ...

stdlib/shutil.pyi

@@ -82,17 +82,15 @@ else:
         ignore_dangling_symlinks: bool = ...,
     ) -> _PathReturn: ...
 
+_OnErrorCallback: TypeAlias = Callable[[Callable[..., Any], Any, Any], object]
+
 if sys.version_info >= (3, 11):
     def rmtree(
-        path: StrOrBytesPath,
-        ignore_errors: bool = ...,
-        onerror: Callable[[Any, Any, Any], Any] | None = ...,
-        *,
-        dir_fd: int | None = ...,
+        path: StrOrBytesPath, ignore_errors: bool = ..., onerror: _OnErrorCallback | None = ..., *, dir_fd: int | None = ...
     ) -> None: ...
 
 else:
-    def rmtree(path: StrOrBytesPath, ignore_errors: bool = ..., onerror: Callable[[Any, Any, Any], Any] | None = ...) -> None: ...
+    def rmtree(path: StrOrBytesPath, ignore_errors: bool = ..., onerror: _OnErrorCallback | None = ...) -> None: ...
 
 _CopyFn: TypeAlias = Callable[[str, str], object] | Callable[[StrPath, StrPath], object]
 

stdlib/telnetlib.pyi

@@ -103,7 +103,7 @@ class Telnet:
     def read_lazy(self) -> bytes: ...
     def read_very_lazy(self) -> bytes: ...
     def read_sb_data(self) -> bytes: ...
-    def set_option_negotiation_callback(self, callback: Callable[[socket.socket, bytes, bytes], Any] | None) -> None: ...
+    def set_option_negotiation_callback(self, callback: Callable[[socket.socket, bytes, bytes], object] | None) -> None: ...
     def process_rawq(self) -> None: ...
     def rawq_getchar(self) -> bytes: ...
     def fill_rawq(self) -> None: ...

stdlib/threading.pyi

@@ -75,7 +75,7 @@ class Thread:
     def __init__(
         self,
         group: None = ...,
-        target: Callable[..., Any] | None = ...,
+        target: Callable[..., object] | None = ...,
         name: str | None = ...,
         args: Iterable[Any] = ...,
         kwargs: Mapping[str, Any] | None = ...,
@@ -171,7 +171,7 @@ class Timer(Thread):
     def __init__(
         self,
         interval: float,
-        function: Callable[..., Any],
+        function: Callable[..., object],
         args: Iterable[Any] | None = ...,
         kwargs: Mapping[str, Any] | None = ...,
     ) -> None: ...

stdlib/timeit.pyi

@@ -5,7 +5,7 @@ from typing_extensions import TypeAlias
 __all__ = ["Timer", "timeit", "repeat", "default_timer"]
 
 _Timer: TypeAlias = Callable[[], float]
-_Stmt: TypeAlias = str | Callable[[], Any]
+_Stmt: TypeAlias = str | Callable[[], object]
 
 default_timer: _Timer
 
@@ -16,7 +16,7 @@ class Timer:
     def print_exc(self, file: IO[str] | None = ...) -> None: ...
     def timeit(self, number: int = ...) -> float: ...
     def repeat(self, repeat: int = ..., number: int = ...) -> list[float]: ...
-    def autorange(self, callback: Callable[[int, float], Any] | None = ...) -> tuple[int, float]: ...
+    def autorange(self, callback: Callable[[int, float], object] | None = ...) -> tuple[int, float]: ...
 
 def timeit(
     stmt: _Stmt = ..., setup: _Stmt = ..., timer: _Timer = ..., number: int = ..., globals: dict[str, Any] | None = ...

stdlib/wsgiref/validate.pyi

@@ -1,6 +1,7 @@
 from _typeshed.wsgi import ErrorStream, InputStream, WSGIApplication
 from collections.abc import Callable, Iterable, Iterator
 from typing import Any, NoReturn
+from typing_extensions import TypeAlias
 
 __all__ = ["validator"]
 
@@ -25,9 +26,11 @@ class ErrorWrapper:
     def writelines(self, seq: Iterable[str]) -> None: ...
     def close(self) -> NoReturn: ...
 
+_WriterCallback: TypeAlias = Callable[[bytes], Any]
+
 class WriteWrapper:
-    writer: Callable[[bytes], Any]
-    def __init__(self, wsgi_writer: Callable[[bytes], Any]) -> None: ...
+    writer: _WriterCallback
+    def __init__(self, wsgi_writer: _WriterCallback) -> None: ...
     def __call__(self, s: bytes) -> None: ...
 
 class PartialIteratorWrapper:

stdlib/xml/etree/ElementTree.pyi

@@ -325,7 +325,7 @@ if sys.version_info >= (3, 8):
     class C14NWriterTarget:
         def __init__(
             self,
-            write: Callable[[str], Any],
+            write: Callable[[str], object],
             *,
             with_comments: bool = ...,
             strip_text: bool = ...,