From cc110e64782ce6149af6d21099c2eaf5658b2898 Mon Sep 17 00:00:00 2001
From: Drew Hubl <drew.hubl+github@gmail.com>
Date: Thu, 29 May 2014 09:48:46 -0600
Subject: [PATCH] Use Python sets instead of conditional continues

---
 html5lib/sanitizer.py | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/html5lib/sanitizer.py b/html5lib/sanitizer.py
index 469d9b40..5ea20e96 100644
--- a/html5lib/sanitizer.py
+++ b/html5lib/sanitizer.py
@@ -182,9 +182,7 @@ def allowed_token(self, token, token_type):
             attrs = dict([(name, val) for name, val in
                           token["data"][::-1]
                           if name in self.allowed_attributes])
-            for attr in self.attr_val_is_uri:
-                if attr not in attrs:
-                    continue
+            for attr in set(attrs.keys()).intersection(set(self.attr_val_is_uri)):
                 val_unescaped = re.sub("[`\000-\040\177-\240\s]+", '',
                                        unescape(attrs[attr])).lower()
                 # remove replacement characters from unescaped characters