title: Python functions return 1 when there is an exception
body: <p>Could you please explain why does the followin function return "1" when there is an exception? What is the purpose of returning "1"?</p>
  
  <pre><code>def initialize():
      """
      Starting point for the program.
      """
      try:
          go = Car()
          print "Instance of Car created"
      except KeyboardInterrupt:
          return 1
  </code></pre>