title: Python: Convert a list into a normal value
body: <p>I have a list</p>
  
  <pre><code>a = [3]
  print a
  [3]
  </code></pre>
  
  <p>I want ot convert it into a normal integer</p>
  
  <pre><code>print a
  3
  </code></pre>
  
  <p>How do I do that?</p>