title: python sort csv column as integer
body: <p>Trying to sort a csv integer column but it get sorted alphabetically.</p>
  
  <p>This sorts alphabetically not numerically</p>
  
  <pre><code>sortedChanels = sorted(reader, key=operator.itemgetter(4), reverse=False)
  </code></pre>
  
  <p>Tried </p>
  
  <pre><code>sortedChanels = sorted(reader, key=lambda t: int(t(4)))
  </code></pre>
  
  <p>get error</p>
  
  <blockquote>
    <p>TypeError: 'list' object is not callable</p>
  </blockquote>