From 67a521ef69655044f771aa925b232b267936fea6 Mon Sep 17 00:00:00 2001
From: Fred Drake <fdrake@acm.org>
Date: Thu, 6 May 2004 12:44:29 +0000
Subject: note that descriptor objects must be instances of new-style types
 (closes SF bug #817742)

---
 Doc/ref/ref3.tex | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Doc/ref/ref3.tex b/Doc/ref/ref3.tex
index 1daf18a..9cd7a4c 100644
--- a/Doc/ref/ref3.tex
+++ b/Doc/ref/ref3.tex
@@ -1296,7 +1296,8 @@ containing the method (a so-called \emph{descriptor} class) appears in
 the class dictionary of another new-style class, known as the
 \emph{owner} class. In the examples below, ``the attribute'' refers to
 the attribute whose name is the key of the property in the owner
-class' \code{__dict__}.
+class' \code{__dict__}.  Descriptors can only be implemented as
+new-style classes themselves.
 
 \begin{methoddesc}[object]{__get__}{self, instance, owner}
 Called to get the attribute of the owner class (class attribute access)
-- 
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