code: def show_message(self, message, duration=2500):
          
  
          self.setText(message)
          self.__duration = duration
  
          self.__set_position()
  
          if message:
              self.__fade_in()
          else:
              self.__fade_out()
          return True
docs: Shows given message.
  
          :param message: Message.
          :type message: unicode
          :param duration: Notification duration in milliseconds.
          :type duration: int
          :return: Method success.
          :rtype: bool