title: How to input an integer tuple from user?
body: <p>Presently I am doing this</p>
  
  <pre><code>print 'Enter source'
  source = tuple(sys.stdin.readline())
  
  print 'Enter target'
  target = tuple(sys.stdin.readline())
  </code></pre>
  
  <p>but source and target become string tuples in this case with a \n at the end</p>