code: def __init__(self, q: "Queue[_T]") -> None:
      self.q = q
  
imports: import collections
  import datetime
  import heapq
  from tornado import gen, ioloop
  from tornado.concurrent import Future, future_set_result_unless_cancelled
  from tornado.locks import Event
  from typing import Union, TypeVar, Generic, Awaitable, Optional
  import typing
label_desc: Use image node_id 1 to create a new _QueueIterator object from inherited base classes: Generic with example: obj = _QueueIterator(q)