title: Converting pandas dataframe into basket type orange table
body: <p>I have the following pandas dataframe and would like any pointers in converting this to an Orange table with a basket format:</p>
  
  <pre><code>orders_item=pandas.DataFrame({'order_number':['001','002','002','002','003','003','003','003','003'],
  'item':['Beef','Beef','Fish','Eggs','Beef','Oil','Salt','Pepper','MSG']})
  </code></pre>
  
  <p>I'll like to convert it to an orange table with Basket format similar to this:</p>
  
  <pre><code>Beef
  
  Beef, Fish, Eggs
  
  Beef, Oil, Salt, Pepper, MSG
  </code></pre>
  
  <p>Any help will be much appreciated.</p>