title: How can remove a column name/label from a pivot table and remaining column names drop to index name level?
body: <p>I have a pivot table using CategoricalDtype so I can get the month names in order. How can I can drop the column name/label "Month" and then move the month abbreviation names to the same level as "Year"?</p>
  
  <p>...
  .pivot_table(index='Year',columns='Month',values='UpClose',aggfunc=np.sum))</p>
  
  <p>Current output:</p>
  
  <pre><code>Month   Jan   Feb   Mar  Apr  May   Jun   Jul   Aug   Sep   Oct   Nov  Dec  Total
  Year    
  1997    12.0  8.0   8.0  12.0  11.0 12.0  14.0  10.0  10.0  10.0  10.0 9.0  126.0
  1998    10.0  12.0  14.0 12.0  9.0  11.0  10.0  8.0   11.0  10.0  10.0 12.0 129.0
  </code></pre>
  
  <p>Desired output:</p>
  
  <pre><code>Year    Jan   Feb   Mar  Apr  May   Jun   Jul   Aug   Sep   Oct   Nov  Dec  Total
  1997    12.0  8.0   8.0  12.0  11.0 12.0  14.0  10.0  10.0  10.0  10.0 9.0  126.0
  1998    10.0  12.0  14.0 12.0  9.0  11.0  10.0  8.0   11.0  10.0  10.0 12.0 129.0
  </code></pre>
  
  <p>If I use, <code>data.columns.name = None</code> it will remove the "Month" label, but it doesn't drop the month abbreviations to the same level as "Year.</p>