From 2bb052599031f883ec220921c45d23eee6ae32f3 Mon Sep 17 00:00:00 2001
From: Kenneth Reitz <me@kennethreitz.com>
Date: Fri, 5 Nov 2010 09:46:14 -0400
Subject: [PATCH] Optimized set intersection for tag checking.

---
 tablib/core.py | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/tablib/core.py b/tablib/core.py
index b5c2526..1417000 100644
--- a/tablib/core.py
+++ b/tablib/core.py
@@ -76,12 +76,9 @@ class Row(object):
 		if tag == None:
 			return False
 		elif isinstance(tag, basestring):
-			return tag in self.tags
-		else:
-			for t in tag:
-				if t in self.tags:
-					return True
-			return False
+			return (tag in self.tags)
+		else:			
+			return True if len(set(tag) & set(self.tags)) else False
 
 
 class Dataset(object):