From 6796d6bc9c7b7be904c31bc07b210e46f0a90652 Mon Sep 17 00:00:00 2001
From: Dan Colish <dcolish@gmail.com>
Date: Mon, 14 Mar 2011 17:25:47 -0400
Subject: Add exception message for DataError being thrown in hmset

---
 redis/client.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/redis/client.py b/redis/client.py
index 8e85a90..7b1c1ae 100644
--- a/redis/client.py
+++ b/redis/client.py
@@ -1153,7 +1153,7 @@ class Redis(threading.local):
         """
         items = []
         if len(mapping) == 0:
-            raise DataError
+            raise DataError("'hmset' with 'mapping' of length 0")
         for pair in mapping.iteritems():
             items.extend(pair)
         return self.execute_command('HMSET', name, *items)
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