From 548685e364af3d366d3aef924b2077ee6f8d13dc Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Sat, 25 Jan 2020 11:04:55 -0800
Subject: [PATCH] bpo-15243: Document __prepare__ as classmethod (GH-17124)

(cherry picked from commit 7de617455ed788e6730c40cf854c4b72b0432194)

Co-authored-by: alclarks <57201106+alclarks@users.noreply.github.com>
---
 Doc/reference/datamodel.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 7d6cc34373b6..d25357db4346 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -1931,7 +1931,8 @@ Preparing the class namespace
 Once the appropriate metaclass has been identified, then the class namespace
 is prepared. If the metaclass has a ``__prepare__`` attribute, it is called
 as ``namespace = metaclass.__prepare__(name, bases, **kwds)`` (where the
-additional keyword arguments, if any, come from the class definition).
+additional keyword arguments, if any, come from the class definition). The
+``__prepare__`` method should be implemented as a :func:`classmethod`.
 
 If the metaclass has no ``__prepare__`` attribute, then the class namespace
 is initialised as an empty ordered mapping.
-- 
2.47.3