title: Regex match of hexdigest in google app engine webapp WSGIApplication
body: <pre><code>application = webapp.WSGIApplication(
      [(r'/main/profile/([a-f0-9]{40})', ProfileHandler)],
      debug=True)
  </code></pre>
  
  <p>The regex in the above parameter will not recognize a 40 hex long hexdigest in Google App Engine.</p>
  
  <p>I'm getting 404s instead of ProfileHandler being passed the matching 40 hex long profile ID. My app.yaml passes everything /main/.* to the correct python script so that's not the issue.  The regex looks sane and <a href="http://code.google.com/appengine/docs/python/tools/webapp/running.html" rel="nofollow noreferrer">resembles the example regex in GAE docs</a>. What is wrong with this regex?</p>