title: Different column length PrettyTable
body: <p>Is it possible to get different lengths in column's in prettytable? When I try to use a list in PrettyTable I get the error: column length's do not match. Because one list has more items in it then the other list.</p>
  
  <p>Example:</p>
  
  <pre><code>ListA = ("111", "222")
  ListB = ("333")
  </code></pre>
  
  <p>PrettyTable:</p>
  
  <pre><code>t = Prettytable([])
  t.add_column('Test1', ListA)
  t.add_column('Test2', ListB)
  print(t)
  </code></pre>