text: # -*- coding: utf-8 -*-
  
  # Copyright (c) 2015 Ericsson AB
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  
  class DisplayBase(object):
  
      """
      Base class for display
      """
  
      def enable(self, enable):
          """
          Enable/disable display
          """
          pass
  
      def show_text(self, text):
          """
          Display text
          """
          raise NotImplementedError()
  
      def clear(self):
          """
          Clear display
          """
          pass
  