old_contents: import mimetypes
  
  if __name__ == '__main__':
      mimetypes.init()
      mimetypes.add_type('application/json', '.json')
      import SimpleHTTPServer
      SimpleHTTPServer.test()
  
new_contents: import sys
  
  if __name__ == '__main__':
      if sys.version_info[0] >= 3:
          import http.server
          import socketserver
          PORT = int(sys.argv[1])
          Handler = http.server.SimpleHTTPRequestHandler
          httpd = socketserver.TCPServer(("", PORT), Handler)
          httpd.serve_forever()
      else:
          import mimetypes
          mimetypes.init()
          mimetypes.add_type('application/json', '.json')
          import SimpleHTTPServer
          SimpleHTTPServer.test()
  
  
subject: Fix the uri testserver to run on python3