From: Georg Brandl <georg@python.org>
Date: Wed, 21 Oct 2009 07:15:59 +0000 (+0000)
Subject: #7170: fix explanation about non-weakrefable builtin types.
X-Git-Tag: v2.7a1~294
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=cf842ad418fa2b4b820e9f15a69dc5dd04dbd546;p=python

#7170: fix explanation about non-weakrefable builtin types.
---

diff --git a/Doc/library/weakref.rst b/Doc/library/weakref.rst
index a1a3314ffb..c800ecd31e 100644
--- a/Doc/library/weakref.rst
+++ b/Doc/library/weakref.rst
@@ -76,6 +76,10 @@ support weak references but can add support through subclassing::
 
    obj = Dict(red=1, green=2, blue=3)   # this object is weak referenceable
 
+Other built-in types such as :class:`tuple` and :class:`long` do not support
+weak references even when subclassed (those types implemented as a
+:ctype:`PyVarObject`).
+
 Extension types can easily be made to support weak references; see
 :ref:`weakref-support`.