class_docstr: Combines an object with a dictionary of defaults.
  
  Used internally by AsyncHTTPClient implementations.
class_docstr_tok: ["Combines","an","object","with","a","dictionary","of","defaults",".","Used","internally","by","AsyncHTTPClient","implementations","."]
code: def __init__(
      self, request: HTTPRequest, defaults: Optional[Dict[str, Any]]
  ) -> None:
      self.request = request
      self.defaults = defaults
  
imports: import datetime
  import functools
  from io import BytesIO
  import ssl
  import time
  import weakref
  from tornado.concurrent import Future, future_set_result_unless_cancelled, future_set_exception_unless_cancelled
  from tornado.escape import utf8, native_str
  from tornado import gen, httputil
  from tornado.ioloop import IOLoop
  from tornado.util import Configurable
  from typing import Type, Any, Union, Dict, Callable, Optional, cast
label_desc: Use image node_id 1 to create a new _RequestProxy object from inherited base classes: object with example: obj = _RequestProxy(request, defaults)