def getValue(self):
    '''
    Returns
      str(option_string * DropDown Value)
      e.g.
      -vvvvv
    '''
    dropdown_value = self.widget.GetValue()
    if not str(dropdown_value).isdigit():
      return ''
    arg = str(self.option_string).replace('-', '')
    repeated_args = arg * int(dropdown_value)
    return '-' + repeated_args
Returns
      str(option_string * DropDown Value)
      e.g.
      -vvvvv