[3.10] gh-99535: Add test for inheritance of annotations and update documentation (GH-99990) (#100509)

(cherry picked from commit f5b7b19bf10724d831285fb04e00f763838bd555)

Co-authored-by: MonadChains <monadchains@gmail.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/Doc/howto/annotations.rst b/Doc/howto/annotations.rst
index 2bc2f2d..4720690 100644
--- a/Doc/howto/annotations.rst
+++ b/Doc/howto/annotations.rst
@@ -57,6 +57,12 @@ Accessing The Annotations Dict Of An Object In Python 3.10 And Newer
   newer is to call :func:`getattr` with three arguments,
   for example ``getattr(o, '__annotations__', None)``.
 
+  Before Python 3.10, accessing ``__annotations__`` on a class that
+  defines no annotations but that has a parent class with
+  annotations would return the parent's ``__annotations__``.
+  In Python 3.10 and newer, the child class's annotations
+  will be an empty dict instead.
+
 
 Accessing The Annotations Dict Of An Object In Python 3.9 And Older
 ===================================================================
diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst
index d415f14..d327520 100644
--- a/Doc/library/typing.rst
+++ b/Doc/library/typing.rst
@@ -2233,6 +2233,10 @@ Introspection helpers
    .. versionchanged:: 3.9
       Added ``include_extras`` parameter as part of :pep:`593`.
 
+   .. versionchanged:: 3.10
+      Calling ``get_type_hints()`` on a class no longer returns the annotations
+      of its base classes.
+
 .. function:: get_args(tp)
 .. function:: get_origin(tp)