[Python-checkins] gh-104874: Document NewType.__supertype__ (#104875)

[AlexWaygood]

https://github.com/python/cpython/commit/41768a2bd3a8f57e6ce4e4ae9cab083b69817ec1
commit: 41768a2bd3a8f57e6ce4e4ae9cab083b69817ec1
branch: main
author: Jelle Zijlstra <jelle.zijlstra at gmail.com>
committer: AlexWaygood <Alex.Waygood at Gmail.com>
date: 2023-05-25T00:23:28+01:00
summary:

gh-104874: Document NewType.__supertype__ (#104875)

files:
A Misc/NEWS.d/next/Library/2023-05-24-09-34-23.gh-issue-104874.oqyJSy.rst
M Doc/library/typing.rst

diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst
index 92943c46ef51..df16c31c43f5 100644
--- a/Doc/library/typing.rst
+++ b/Doc/library/typing.rst
@@ -1648,6 +1648,18 @@ These are not used in annotations. They are building blocks for declaring types.
       UserId = NewType('UserId', int)
       first_user = UserId(1)
 
+   .. attribute:: __module__
+
+      The module in which the new type is defined.
+
+   .. attribute:: __name__
+
+      The name of the new type.
+
+   .. attribute:: __supertype__
+
+      The type that the new type is based on.
+
    .. versionadded:: 3.5.2
 
    .. versionchanged:: 3.10
diff --git a/Misc/NEWS.d/next/Library/2023-05-24-09-34-23.gh-issue-104874.oqyJSy.rst b/Misc/NEWS.d/next/Library/2023-05-24-09-34-23.gh-issue-104874.oqyJSy.rst
new file mode 100644
index 000000000000..9d5904bc1464
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2023-05-24-09-34-23.gh-issue-104874.oqyJSy.rst
@@ -0,0 +1,2 @@
+Document the ``__name__`` and ``__supertype__`` attributes of
+:class:`typing.NewType`. Patch by Jelle Zijlstra.