code: def start_server(self, host='localhost', port=9000, app=None):
          
          from wsgiref.simple_server import make_server
          if app is None:
              app = self.wsgi
          server = make_server(host, port, app)
          server_addr = "%s:%s" % (server.server_name, server.server_port)
          print "Server listening at http://%s/" % server_addr
          server.serve_forever()
docs: Start a `wsgiref.simple_server` based server to run this mapper.