title: Python list.index() from end of the list
body: <p>In python, if I have a list say <code>[2,1,1,3,5]</code>, then is it possible to get</p>
  
  <p><code>[2,1,1,3,5].index(1)</code> as <code>2</code> i.e first match starting from the higher end instead of the lower?</p>