title: How to save in a new column part of an existing string
body: <p>In a dataframe I have a column which contains a list of emails. My manager wants me to keep the name after the <code>@</code> and before the <code>.</code> to a new column.
  I tried the following:</p>
  
  <pre><code>DF['newcolumn'] = DF['email'].split("@")[2].split(".")[0]
  </code></pre>
  
  <p>but it did not work.
  Any ideas?</p>