title: How to write a cell with multiple columns in xlwt?
body: <p>I'd like to write a table like this:</p>
  
  <pre><code>----------------
  | Long Cell    |
  ----------------
  | 1    | 2     |
  ----------------
  </code></pre>
  
  <p>How to write the cell <code>Long Cell</code>? Thanks.</p>
  
  <p>I've tried to do it like this:</p>
  
  <pre><code>sheet.write(0, 0, 'Long Cell')
  sheet.write(1, 0, 1)
  sheet.write(1, 1, 2)
  </code></pre>
  
  <p>But it end up like:</p>
  
  <pre><code>--------------------
  | Long Cell |      |
  --------------------
  | 1         | 2    |
  --------------------
  </code></pre>