code: #!/usr/bin/env python
  
  ###############################################################################
  # Copyright 2017 The Apollo Authors. All Rights Reserved.
  #
  # 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.
  ###############################################################################
  
  import argparse
  import matplotlib.pyplot as plt
  from libs.map import Map
  
  if __name__ == "__main__":
      parser = argparse.ArgumentParser(
          description="Raodshow is a tool to display road info on a map.",
          prog="roadshow.py")
  
      parser.add_argument(
          "-m", "--map", action="store", type=str, required=True,
          help="Specify the map file in txt or binary format")
  
      args = parser.parse_args()
  
      map = Map()
      map.load(args.map)
      map.draw_roads(plt)
  
      plt.axis('equal')
      plt.show()
  
apis: matplotlib.pyplot.axis matplotlib.pyplot.show