title: Python - remove row index and insert column titles
body: <p>Given the following dataframe:</p>
  <pre><code>    a   b   
  1   z   z
  2   z   z
  0   
  0
  1   z   z
  2   z   z
  </code></pre>
  <p>I would like to remove the 0s from the row indexes, and populate the second of those with the column titles, such that the end result is:</p>
  <pre><code>    a   b   
  1   z   z
  2   z   z
      
      a   b
  1   z   z
  2   z   z
  </code></pre>
  <p>How do I achieve this?</p>
  <p>If you're wondering why, it's because I'm writing this dataframe to an Excel sheet, and need distinct tables in order to filter and sort them separately.</p>