Docs: improve generic typing.NamedTuple example (#124739)

CBerJun · web-flow · commit 76fbee642e78 · 2024-09-29T12:07:05.000+01:00
diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst
@@ -2349,7 +2349,9 @@ types.
 
    Backward-compatible usage::
 
-       # For creating a generic NamedTuple on Python 3.11 or lower
+       # For creating a generic NamedTuple on Python 3.11
+       T = TypeVar("T")
+
        class Group(NamedTuple, Generic[T]):
            key: T
            group: list[T]
