title: pandas convert column names to column
body: <p>below is the dataframe (default indexes)</p>
  
  <pre><code>    value 1901 1902 1903 1904
  44   good  12   13   14   15
  70   avge  23   24   25   26
  </code></pre>
  
  <p>(the 44, 70 are indexes which i dont want)</p>
  
  <p>Output should be:</p>
  
  <pre><code>time  good  avge
  1901   12    23
  1902   13    24
  1903   14    25 
  1904   15    26 
  </code></pre>
  
  <p>I tried df.T but not quite in the required format. 
  thanks a lot in advance. (can you refer some nice textbooks for this kind of operational exercises).</p>