title: How to join a few dicts in one?
body: <p>Could somebody help me to transform this:</p>
  
  <pre><code>a = [{'one': 4, 'name': 'value1', 'two': 25}, {'one': 2, 'name': 'value1', 'two': 18}, {'one': 1, 'name': 'value1', 'two': 15}, {'one': 2, 'name': 'value2', 'two': 12}, {'one': 1, 'name': 'value2', 'two': 10}]
  </code></pre>
  
  <p>to something like this:</p>
  
  <pre><code>b = [{'value1': [(4, 25), (2, 18), (1, 15)]}, {'value2': [(2, 12), (1, 10)]}]
  </code></pre>