title: How to remove multilevel index in pandas pivot table
body: <p>I have a dataframe as given: </p>
  
  <pre><code>df = {'TYPE' : pd.Series(['Advisory','Advisory1','Advisory2','Advisory3']),
   'CNTRY' : pd.Series(['IND','FRN','IND','FRN']),
   'VALUE' : pd.Series([1., 2., 3., 4.])}
  df = pd.DataFrame(df)
  df = pd.pivot_table(df,index=["CNTRY"],columns=["TYPE"]).reset_index()
  </code></pre>
  
  <p>After pivoting, how can I get the dataframe having columns and <code>df</code> to be like the below; removing the multilevel index, <code>VALUE</code> </p>
  
  <pre><code>Type|CNTRY|Advisory|Advisory1|Advisory2|Advisory3
  0     FRN     NaN      2.0      NaN     4.0 
  1     IND     1.0      NaN      3.0     NaN 
  </code></pre>