title: pandas pivot_table multiple aggfunc
body: <p>When I create a pivot table on a dataframe I have, passing <code>aggfunc='mean'</code> works as expected, <code>aggfunc='count'</code> works as expected, however <code>aggfunc=['mean', 'count']</code> results in: <code>AttributeError: 'str' object has no attribute '__name__</code></p>
  
  <p>This format seemed to work previously: <a href="https://stackoverflow.com/questions/20485139/multiple-aggfun-in-pandas">Multiple AggFun in Pandas</a></p>
  
  <p>How do I create a pivot table with multiple functions?</p>