From 20a8336ff76baeed972dfc2c559615ef4f2a50b2 Mon Sep 17 00:00:00 2001
From: Skip Montanaro <skip@pobox.com>
Date: Sun, 21 Mar 2004 16:05:30 +0000
Subject: concrete example of why retaining old objects is good

---
 Doc/lib/libfuncs.tex | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/Doc/lib/libfuncs.tex b/Doc/lib/libfuncs.tex
index a96fe49..f596cec 100644
--- a/Doc/lib/libfuncs.tex
+++ b/Doc/lib/libfuncs.tex
@@ -830,7 +830,15 @@ class C(object):
   old version, the old definition remains.  This feature can be used
   to the module's advantage if it maintains a global table or cache of
   objects --- with a \keyword{try} statement it can test for the
-  table's presence and skip its initialization if desired.
+  table's presence and skip its initialization if desired:
+
+\begin{verbatim}
+try:
+    cache
+except NameError:
+    cache = {}
+\end{verbatim}
+
 
   It is legal though generally not very useful to reload built-in or
   dynamically loaded modules, except for \refmodule{sys},
-- 
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