diff --git a/cookbook/helper/mdx_urlize.py b/cookbook/helper/mdx_urlize.py
index 7df06430b..92bcc98be 100644
--- a/cookbook/helper/mdx_urlize.py
+++ b/cookbook/helper/mdx_urlize.py
@@ -1,4 +1,5 @@
-"""A more liberal autolinker
+"""
+A more liberal autolinker
 
 Inspired by Django's urlize function.
 
@@ -45,27 +46,30 @@ URLIZE_RE = '(%s)' % '|'.join([
     r'[^(<\s]+\.(?:com|net|org)\b',
 ])
 
+
 class UrlizePattern(markdown.inlinepatterns.Pattern):
     """ Return a link Element given an autolink (`http://example/com`). """
+
     def handleMatch(self, m):
         url = m.group(2)
-        
+
         if url.startswith('<'):
             url = url[1:-1]
-            
+
         text = url
-        
-        if not url.split('://')[0] in ('http','https','ftp'):
-            if '@' in url and not '/' in url:
+
+        if not url.split('://')[0] in ('http', 'https', 'ftp'):
+            if '@' in url and '/' not in url:
                 url = 'mailto:' + url
             else:
                 url = 'http://' + url
-    
+
         el = markdown.util.etree.Element("a")
         el.set('href', url)
         el.text = markdown.util.AtomicString(text)
         return el
 
+
 class UrlizeExtension(markdown.Extension):
     """ Urlize Extension for Python-Markdown. """
 
@@ -73,9 +77,12 @@ class UrlizeExtension(markdown.Extension):
         """ Replace autolink with UrlizePattern """
         md.inlinePatterns['autolink'] = UrlizePattern(URLIZE_RE, md)
 
+
 def makeExtension(*args, **kwargs):
     return UrlizeExtension(*args, **kwargs)
 
+
 if __name__ == "__main__":
     import doctest
+
     doctest.testmod()