title: Plotting multiple lists of tuples using matplotlib
body: <p>I have formatted data such as this example:  </p>
  
  <pre><code>datalist =  [[(u'2017-06-28', 12), (u'2017-06-29', 0), (u'2017-06-30', 17), (u'2017-06-26', 17), (u'2017-06-27', 8), (u'2017-07-02', 0), (u'2017-07-01', 2)], [(u'2017-06-28', 6), (u'2017-06-29', 3), (u'2017-06-30', 13), (u'2017-06-26', 12), (u'2017-06-27', 9), (u'2017-07-02', 1), (u'2017-07-01', 2)]]
  </code></pre>
  
  <p>which is basically a list of lists of tuples - ([[(date, value), …], [(date, value), …]]. I would like to plot this data such that dates will correspond x-axis labels and values will be heights of my bars for my bar chart. What is the best -or less time consuming way to achieve this? Any help is appreciated. Thanks in advance.</p>