title: Edit List in Python
body: <p>I have a list of Full Names, where Forenames and Surnames are seperated by a comma, for example:</p>
  <p><code>Authors = ['Shakespeare, William', 'Dafoe, Daniel', 'Pilcher, Rosamunde']</code></p>
  <p>I need a new list that contains only the Surnames, not the Forenames:</p>
  <p><code>AuthorsSurname = ['Shakespeare', 'Dafoe', 'Pilcher']</code></p>
  <p>How can I get there? I tried to search the Authors list with</p>
  <pre><code>        regexAuthors = re.compile(r',$')
          AuthorsSurname = (regexAuthors.findall(Authors))
  </code></pre>
  <p>to match all entries until the comma and create a new list, but it says I cannot use &quot;Authors&quot; as an argument here because it is not a string.</p>
  <p>(the linked topic did not help)</p>