From 9110257a328bacae0a6131ca7b3c8b241fef128c Mon Sep 17 00:00:00 2001
From: Alex Gaynor <alex.gaynor@gmail.com>
Date: Sat, 3 Sep 2011 19:50:45 +0000
Subject: [PATCH] `is` should not be used on primitive objects, use == instead,
 correctly.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16719 bcc190cf-cafb-0310-a4f2-bffc1f526a37
---
 django/contrib/localflavor/mx/forms.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/django/contrib/localflavor/mx/forms.py b/django/contrib/localflavor/mx/forms.py
index 95ca73d901..deecb4ea41 100644
--- a/django/contrib/localflavor/mx/forms.py
+++ b/django/contrib/localflavor/mx/forms.py
@@ -143,7 +143,7 @@ class MXRFCField(RegexField):
             www.sisi.org.mx/jspsi/documentos/2005/seguimiento/06101/0610100162005_065.doc
         """
         chars = u'0123456789ABCDEFGHIJKLMN&OPQRSTUVWXYZ-Ñ'
-        if len(rfc) is 11:
+        if len(rfc) == 11:
             rfc = '-' + rfc
 
         sum_ = sum(i * chars.index(c) for i, c in zip(reversed(xrange(14)), rfc))