title: Sum of each element in python list of tuples
body: <p>I want to add each element of list containing tuples. For example,</p>
  
  <pre><code>    &gt;&gt;&gt; list1
      [(0, 1, 2), (3, 4, 5), (6, 7, 8)]
      &gt;&gt;&gt; list2
      [(1, 2, 3), (4, 5, 6), (7, 8, 9)]
  </code></pre>
  
  <p>Answer should be </p>
  
  <pre><code>     list3 = [(1,3,5),(7,9,11),(13,15,17)]
  </code></pre>