code: def __init__(self, host_slots, host_assignment_order):
      self._host_slots = host_slots
      self._host_assignment_order = host_assignment_order
  
imports: import io
  import logging
  import random
  import threading
  import time
  from collections import defaultdict
  from horovod.runner.common.util import safe_shell_exec
  from horovod.runner.elastic.worker import HostUpdateResult
label_desc: Use image node_id 1 to create a new DiscoveredHosts object from inherited base classes: object with example: obj = DiscoveredHosts(host_slots, host_assignment_order)