title: plotting histogram using matplotlib in python
body: <p>I have a file containing 2 columns like:  </p>
  
  <pre><code>111, 3  
  122, 4  
  155, 3  
  192, 5  
  11,  9  
  123, 10  
  120, 23
  </code></pre>
  
  <p>How can I be able to write the data like ((111,122,155,192,11,123,120),(3,4,3,5,9,10,23)) .
  Now all I want to do is to plot it in a histogram using <code>matplotlib</code>.<br>
  please help with some basic ideas. !</p>