title: Pandas drop rows where column contains *
body: <p>I'm trying to drop all rows from this df where column 'DB Serial' contains the character *:</p>
  
  <pre><code>    DB Serial
  0     13058
  1     13069
  2    *13070
  3     13070
  4     13044
  5     13042
  </code></pre>
  
  <p>I am using:</p>
  
  <pre><code>df = df[~df['DB Serial'].str.contains('*')]
  </code></pre>
  
  <p>but i get this error:</p>
  
  <pre><code>    raise error, v # invalid expression
  error: nothing to repeat
  </code></pre>