From afc77b2958f6323e1f5dea6932eafdd3baf87e8b Mon Sep 17 00:00:00 2001
From: Jelle Zijlstra <jelle.zijlstra@gmail.com>
Date: Wed, 25 Sep 2024 23:26:03 -0700
Subject: [PATCH] [3.12] gh-101100: Make __subclasses__ doctest stable
 (GH-124577)

Using a standard library class makes this test difficult to maintain
as other tests and other parts of the stdlib may create subclasses,
which may still be alive when this test runs depending on GC timing.
(cherry picked from commit 08a467b537b3d9b499d060697e79b3950374ab0f)

Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>
---
 Doc/reference/datamodel.rst | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 5dcdb7bd8dd414..d1993fedb0ca44 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -1048,8 +1048,10 @@ have the following two methods available:
 
    .. doctest::
 
-      >>> int.__subclasses__()
-      [<class 'bool'>, <enum 'IntEnum'>, <flag 'IntFlag'>, <class 're._constants._NamedIntConstant'>]
+      >>> class A: pass
+      >>> class B(A): pass
+      >>> A.__subclasses__()
+      [<class 'B'>]
 
 Class instances
 ---------------