title: Is it possible to use read_csv to read only specific lines?
body: <p>I have a csv file that looks like this:</p>
  
  <pre><code>TEST  
  2012-05-01 00:00:00.203 ON 1  
  2012-05-01 00:00:11.203 OFF 0  
  2012-05-01 00:00:22.203 ON 1  
  2012-05-01 00:00:33.203 OFF 0  
  2012-05-01 00:00:44.203 OFF 0  
  TEST  
  2012-05-02 00:00:00.203 OFF 0  
  2012-05-02 00:00:11.203 OFF 0  
  2012-05-02 00:00:22.203 OFF 0  
  2012-05-02 00:00:33.203 OFF 0  
  2012-05-02 00:00:44.203 ON 1  
  2012-05-02 00:00:55.203 OFF 0  
  </code></pre>
  
  <p>and cannot get rid of the <code>"TEST"</code> string.</p>
  
  <p>Is it possible to check whether a line starts with a date and read only those that do?</p>