code: def __init__(self, router, server_conn, request_conn):
      self.server_conn = server_conn
      self.request_conn = request_conn
      self.delegate = None
      self.router = router
  
imports: from __future__ import absolute_import, division, print_function
  import re
  from functools import partial
  from tornado import httputil
  from tornado.httpserver import _CallableAdapter
  from tornado.escape import url_escape, url_unescape, utf8
  from tornado.log import app_log
  from tornado.util import basestring_type, import_object, re_unescape, unicode_type
label_desc: Use image node_id 1 to create a new _RoutingDelegate object from inherited base classes: httputil with example: obj = _RoutingDelegate(router, server_conn, request_conn)