title: Can I extend list in Python with prepend elements instead of append?
body: <p>I can perform</p>
  
  <pre><code>a = [1,2,3]
  b = [4,5,6]
  a.extend(b)
  # a is now [1,2,3,4,5,6]
  </code></pre>
  
  <p>Is there way to perform an action for extending list and adding new items to the beginning of the list?</p>
  
  <p>Like this </p>
  
  <pre><code>a = [1,2,3]
  b = [4,5,6]
  a.someaction(b)
  # a is now [4,5,6,1,2,3]
  </code></pre>
  
  <p>I use version 2.7.5, if it is important.</p>