title: Why is this '_' used in the third line? Python2.7
body: <p>I am using python to learn about data science. Everything is fine but recently I found below code in a book. I can't understand for what purpose <strong>'_'</strong> is being used.</p>
  
  <pre><code>def raw_majority_vote(labels):
      votes = Counter(labels)
      winner, _ = votes.most_common(1)[0]
      return winner
  </code></pre>