new_contents: import json
  
  f = open('stations.json')
  dict = json.load(f)
  f.close()
  
  tables = ["|station_id|group_id|name|type|", "|---:|---:|:--:|:--:|"]
  row = "|%s|%s|%s|%s|"
  
  stations = dict['stations']
  for s in stations:
      r = row % (s['station_id'], s['group_id'], s['station_name'], s['station_type'])
      tables.append(r)
  
  md = '\n'.join(tables)
  
  md_file_name = "station.md"
  
  with open(md_file_name, 'w') as f:
      f.write(md)
  
  
subject: add a generate table script