title: how to assign hierarchical column names in pandas dataframe
body: <p>My CSV file has on the first 2 rows the names that I would like to use as column names and the first two columns as row names. So, the file looks like this:</p>
  
  <pre><code>tp,desc,L,L,D,D
  ,,1,2,3,4
  3001, foo, 23.1, 35.3, 52.0, 11.9
  3010, bar, 31.l, 25.9, 13.9, 134.8
  </code></pre>
  
  <p>I was able to set the first two columns as an index, but am stuck on getting the first two rows be accepted as column names</p>
  
  <p>This is my input statement so far:</p>
  
  <pre><code>df = pd.read_csv("file.csv", index_col=[tp,desc])
  </code></pre>
  
  <p>Thanks.</p>