title: How to convert list into set in pandas?
body: <p>I have a dataframe as below:  </p>
  
  <pre><code>           date                     uids
  0  2018-11-23  [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
  1  2018-11-24  [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13]
  </code></pre>
  
  <p>When I use <code>set</code> to convert it to set it fails:  </p>
  
  <pre><code>df['uids'] = set(df['uids'])  # IT FAILS!
  </code></pre>
  
  <p>How should I convert <code>list</code> into <code>set</code> in place?</p>