title: The python's argparse errors
body: <p>where report this error : TypeError: 'Namespace' object is not iterable</p>
  
  <pre><code>import argparse
  
  def parse_args():
      parser = argparse.ArgumentParser(add_help=True)
      parser.add_argument('-a', '--aa', action="store_true", default=False)
      parser.add_argument('-b', action="store", dest="b")
      parser.add_argument('-c', action="store", dest="c", type=int)
  
      return parser.parse_args()
  
  def main():
      (options, args) = parse_args()
  
  if __name__ == '__main__':
      main()
  </code></pre>