title: Plotting bar charts by each two rows
body: <p>I have something like this </p>
  
  <pre><code> id_1 1000
   id_2 200
   id_3  100
   id_4  50
  </code></pre>
  
  <p>Now since this is in a dataframe I can do df.plot(kind='bar') 
  However this not what I really want I want something like seperate bar charts for each two consecutive id's.
  Would it be better to pivot the dataframe and then plot from there?
  Or is there a neat loop I can use. I'm quite bad at using matplotlib. </p>