Make iscoroutinefunction TypeIs

stdlib/@tests/test_cases/asyncio/check_coroutines.py

@@ -19,10 +19,10 @@ def test_iscoroutinefunction_asyncio(
             assert_type(x, Callable[[str, int], Coroutine[str, int, bytes]])
 
         if iscoroutinefunction(y):  # pyright: ignore
-            assert_type(y, Callable[[str, int], Coroutine[Any, Any, bytes]])
+            assert_type(y, Callable[[str, int], Awaitable[bytes]])
 
         if iscoroutinefunction(z):  # pyright: ignore
-            assert_type(z, Callable[[str, int], Coroutine[Any, Any, Any]])
+            assert_type(z, Callable[[str, int], str | Awaitable[bytes]])
 
         if iscoroutinefunction(xx):  # pyright: ignore
             assert_type(xx, Callable[..., Coroutine[Any, Any, Any]])
@@ -31,10 +31,10 @@ def test_iscoroutinefunction_asyncio(
             assert_type(x, Callable[[str, int], Coroutine[str, int, bytes]])
 
         if iscoroutinefunction(y):
-            assert_type(y, Callable[[str, int], Coroutine[Any, Any, bytes]])
+            assert_type(y, Callable[[str, int], Awaitable[bytes]])
 
         if iscoroutinefunction(z):
-            assert_type(z, Callable[[str, int], Coroutine[Any, Any, Any]])
+            assert_type(z, Callable[[str, int], str | Awaitable[bytes]])
 
         if iscoroutinefunction(xx):
             assert_type(xx, Callable[..., Coroutine[Any, Any, Any]])

stdlib/@tests/test_cases/check_inspect.py

@@ -17,10 +17,10 @@ def test_iscoroutinefunction_inspect(
         assert_type(x, Callable[[str, int], Coroutine[str, int, bytes]])
 
     if inspect.iscoroutinefunction(y):
-        assert_type(y, Callable[[str, int], CoroutineType[Any, Any, bytes]])
+        assert_type(y, Callable[[str, int], Awaitable[bytes]])
 
     if inspect.iscoroutinefunction(z):
-        assert_type(z, Callable[[str, int], CoroutineType[Any, Any, Any]])
+        assert_type(z, Callable[[str, int], str | Awaitable[bytes]])
 
     if inspect.iscoroutinefunction(xx):
         assert_type(xx, Callable[..., CoroutineType[Any, Any, Any]])

stdlib/asyncio/coroutines.pyi

@@ -1,6 +1,6 @@
 import sys
 from collections.abc import Awaitable, Callable, Coroutine
-from typing import Any, ParamSpec, TypeGuard, TypeVar, overload
+from typing import Any, ParamSpec, TypeVar, overload
 from typing_extensions import TypeIs, deprecated
 
 # Keep asyncio.__all__ updated with any changes to __all__ here
@@ -25,21 +25,21 @@ if sys.version_info >= (3, 11):
     def iscoroutinefunction(func: Callable[..., Coroutine[Any, Any, Any]]) -> bool: ...
     @overload
     @deprecated("Deprecated since Python 3.14. Use `inspect.iscoroutinefunction()` instead.")
-    def iscoroutinefunction(func: Callable[_P, Awaitable[_T]]) -> TypeGuard[Callable[_P, Coroutine[Any, Any, _T]]]: ...
+    def iscoroutinefunction(func: Callable[_P, Awaitable[_T]]) -> TypeIs[Callable[_P, Coroutine[Any, Any, _T]]]: ...
     @overload
     @deprecated("Deprecated since Python 3.14. Use `inspect.iscoroutinefunction()` instead.")
-    def iscoroutinefunction(func: Callable[_P, object]) -> TypeGuard[Callable[_P, Coroutine[Any, Any, Any]]]: ...
+    def iscoroutinefunction(func: Callable[_P, object]) -> TypeIs[Callable[_P, Coroutine[Any, Any, Any]]]: ...
     @overload
     @deprecated("Deprecated since Python 3.14. Use `inspect.iscoroutinefunction()` instead.")
-    def iscoroutinefunction(func: object) -> TypeGuard[Callable[..., Coroutine[Any, Any, Any]]]: ...
+    def iscoroutinefunction(func: object) -> TypeIs[Callable[..., Coroutine[Any, Any, Any]]]: ...
 else:
     # Sometimes needed in Python < 3.11 due to the fact that it supports @coroutine
     # which was removed in 3.11 which the inspect version doesn't support.
     @overload
     def iscoroutinefunction(func: Callable[..., Coroutine[Any, Any, Any]]) -> bool: ...
     @overload
-    def iscoroutinefunction(func: Callable[_P, Awaitable[_T]]) -> TypeGuard[Callable[_P, Coroutine[Any, Any, _T]]]: ...
+    def iscoroutinefunction(func: Callable[_P, Awaitable[_T]]) -> TypeIs[Callable[_P, Coroutine[Any, Any, _T]]]: ...
     @overload
-    def iscoroutinefunction(func: Callable[_P, object]) -> TypeGuard[Callable[_P, Coroutine[Any, Any, Any]]]: ...
+    def iscoroutinefunction(func: Callable[_P, object]) -> TypeIs[Callable[_P, Coroutine[Any, Any, Any]]]: ...
     @overload
-    def iscoroutinefunction(func: object) -> TypeGuard[Callable[..., Coroutine[Any, Any, Any]]]: ...
+    def iscoroutinefunction(func: object) -> TypeIs[Callable[..., Coroutine[Any, Any, Any]]]: ...

stdlib/inspect.pyi

@@ -239,11 +239,11 @@ def isgeneratorfunction(obj: object) -> TypeGuard[Callable[..., GeneratorType[An
 @overload
 def iscoroutinefunction(obj: Callable[..., Coroutine[Any, Any, Any]]) -> bool: ...
 @overload
-def iscoroutinefunction(obj: Callable[_P, Awaitable[_T]]) -> TypeGuard[Callable[_P, CoroutineType[Any, Any, _T]]]: ...
+def iscoroutinefunction(obj: Callable[_P, Awaitable[_T]]) -> TypeIs[Callable[_P, CoroutineType[Any, Any, _T]]]: ...
 @overload
-def iscoroutinefunction(obj: Callable[_P, object]) -> TypeGuard[Callable[_P, CoroutineType[Any, Any, Any]]]: ...
+def iscoroutinefunction(obj: Callable[_P, object]) -> TypeIs[Callable[_P, CoroutineType[Any, Any, Any]]]: ...
 @overload
-def iscoroutinefunction(obj: object) -> TypeGuard[Callable[..., CoroutineType[Any, Any, Any]]]: ...
+def iscoroutinefunction(obj: object) -> TypeIs[Callable[..., CoroutineType[Any, Any, Any]]]: ...
 
 def isgenerator(object: object) -> TypeIs[GeneratorType[Any, Any, Any]]: ...
 def iscoroutine(object: object) -> TypeIs[CoroutineType[Any, Any, Any]]: ...