title: read_excel in pandas giving error for no header and multiple index_col's
body: <p>This code is giving me an error in Pandas:</p>
  
  <pre><code>df1 = pd.read_excel(file1,header=None, index_col=[0,1])
  </code></pre>
  
  <p>...gives this error:</p>
  
  <blockquote>
    <p>Error:     offset = 1 + header TypeError: unsupported operand type(s)
    for +: 'int' and 'NoneType'</p>
  </blockquote>
  
  <p>If I have only one index col its working fine:</p>
  
  <pre><code>df1 = pd.read_excel(file1,header=None, index_col=0)
  </code></pre>
  
  <p>Or if I have multiple index column with header its working fine:</p>
  
  <pre><code>df1 = pd.read_excel(file1,index_col=[0,1])
  </code></pre>
  
  <p>So, how to define multiple index column with no header. The issue here is internally the code is trying to add 1 to header (which is None) in case of multiple index and its failing.</p>
  
  <p>File content:
  row 1: p  w  1  2
  row 2: q  x  3  4</p>