[Python-checkins] r75580 - python/trunk/Doc/library/weakref.rst

[georg.brandl]

Author: georg.brandl
Date: Wed Oct 21 09:15:59 2009
New Revision: 75580

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

Modified:
   python/trunk/Doc/library/weakref.rst

Modified: python/trunk/Doc/library/weakref.rst
==============================================================================
--- python/trunk/Doc/library/weakref.rst	(original)
+++ python/trunk/Doc/library/weakref.rst	Wed Oct 21 09:15:59 2009
@@ -76,6 +76,10 @@
 
    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`.