code: def _PromptUserForInput(self, input_text):
      
      self._output_writer.Write('{0:s}: '.format(input_text))
      return self._input_reader.Read()
docs: Prompts user for an input.
  
      Args:
        input_text (str): text used for prompting the user for input.
  
      Returns:
        str: input read from the user.