class_docstr: Supervisor thread that runs your script.
class_docstr_tok: ["Supervisor","thread","that","runs","your","script","."]
code: def join(self, timeout=None):
      super(RunnerThread, self).join(timeout)
      return self._ret
  
imports: import os
  import socket
  from contextlib import closing
  import logging
  import queue
  import threading
  from typing import Optional
  import numpy
  from ray.air.constants import _ERROR_REPORT_TIMEOUT
label_desc: Use image node_id 4 for calling the RunnerThread obj's underlying member method code with example usage: obj.join(timeout) and returns: self