From d4a31e5e50c1eca8fb6f885c60b56c15a50dce09 Mon Sep 17 00:00:00 2001
From: Peter Gorniak <pgorniak@tidelinedata.com>
Date: Thu, 8 Dec 2016 14:34:21 -0800
Subject: [PATCH] unit tests did not catch this, but this will not work under
 python 2.6

---
 moto/dynamodb2/models.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/moto/dynamodb2/models.py b/moto/dynamodb2/models.py
index 15a3e3ba3..4bca83582 100644
--- a/moto/dynamodb2/models.py
+++ b/moto/dynamodb2/models.py
@@ -118,7 +118,7 @@ class Item(object):
                 # A Real value
                 value = value.lstrip(":").rstrip(",").strip()
                 for k, v in expression_attribute_names.items():
-                    value = re.sub(r'{}\b'.format(k), v, value)
+                    value = re.sub(r'{0}\b'.format(k), v, value)
 
                 if action == "REMOVE":
                     self.attrs.pop(value, None)