code: def _get_argv(index, default=None):
      ''' get the argv input argument defined by index. Return the default
          attribute if that argument does not exist
      '''
      return _sys.argv[index] if len(_sys.argv) > index else defaulf _get_argv(index, default=None):
      ''' get the argv input argument defined by index. Return the default
          attribute if that argument does not exist
      '''
      return _sys.argv[index] if len(_sys.argv) > index else default
docs: get the argv input argument defined by index. Return the default
          attribute if that argument does not exist