From a30616a88db1ccc481cd5c8e4b78652df5c0f8cf Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <python@rcn.com>
Date: Sun, 21 Aug 2005 11:26:14 +0000
Subject: [PATCH] SF bug #1249837:  container methods raise KeyError not
 IndexError

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

diff --git a/Doc/ref/ref3.tex b/Doc/ref/ref3.tex
index 6754c27ca4c..46388b2faae 100644
--- a/Doc/ref/ref3.tex
+++ b/Doc/ref/ref3.tex
@@ -1658,6 +1658,8 @@ If \var{key} is of an inappropriate type, \exception{TypeError} may be
 raised; if of a value outside the set of indexes for the sequence
 (after any special interpretation of negative values),
 \exception{IndexError} should be raised.
+For mapping types, if \var{key} is missing (not in the container),
+\exception{KeyError} should be raised.                     
 \note{\keyword{for} loops expect that an
 \exception{IndexError} will be raised for illegal indexes to allow
 proper detection of the end of the sequence.}