title: Python Loop Double Printing
body: <p>Using the code below, I am able to get the correct answer, however it is repeated <strong>twice</strong>. </p>
  
  <p>For instance, I would only want a result of <code>[1.2038, 1.206]</code>, but the code below prints <code>[1.2038, 1.206, 1.2038, 1.206]</code>. Anybody knows what is wrong with my code? Any help would be greatly appreciated. Thanks!  </p>
  
  <pre><code>spot = [1.2020, 1.2040]
  forwardSwap = [0.0018, 0.0020]
  forwardOutright = []
  
  for i in range(len(spot)):
      for i in range(len(forwardSwap)):
          forwardOutright.append(spot[i] + forwardSwap[i])
  
  print forwardOutright
  </code></pre>