title: How to remove duplicates from a csv file
body: <p>I have downloaded a CSV file from Hotmail, but it has a lot of duplicates in it. These duplicates are complete copies and I don't know why my phone created them.</p>
  <p>I want to get rid of the duplicates.</p>
  <p><strong>Technical specification</strong>:</p>
  <pre>
  Windows XP SP 3
  Python 2.7
  CSV file with 400 contacts
  </pre>