class_docstr: ZAP authentication for use in the tornado IOLoop
code: def __init__(
      self, context=None, encoding="utf-8", log=None, io_loop=None
  ):
      super(IOLoopAuthenticator, self).__init__(context, encoding, log)
      self.zap_stream = None
      self.io_loop = io_loop or ioloop.IOLoop.current()
  
imports: from tornado import ioloop
  from zmq.eventloop import zmqstream
  from .base import Authenticator
label_desc: Use image node_id 1 to create a new IOLoopAuthenticator object from inherited base classes: Authenticator with example: obj = IOLoopAuthenticator(context, encoding, log, io_loop)