title: How to write a RESTful URL path regex in GAE/Python for n parameters?
body: <p>Currently I have three URL paths that map to ServiceHandler. How do I combine the three into one neat regex that can pass n number of arguments to ServiceHandler?</p>
  
  <pre><code>(r'/s/([^/]*)', ServiceHandler),
  (r'/s/([^/]*)/([^/]*)', ServiceHandler),
  (r'/s/([^/]*)/([^/]*)/([^/]*)', ServiceHandler)
  </code></pre>