code: def __init__(
      self,
      module_backends,
      dht: DHT,
      update_period: float = 30,
      expiration: Optional[int] = None,
      **kwargs,
  ):
      super().__init__(**kwargs)
      if expiration is None:
          expiration = max(
              2 * update_period, MAX_DHT_TIME_DISCREPANCY_SECONDS
          )
      self.module_backends = module_backends
      self.dht = dht
      self.update_period = update_period
      self.expiration = expiration
      self.stop = threading.Event()
  
file_path: hivemind/hivemind/moe/server/dht_handler.py
imports: import threading
  from functools import partial
  from typing import Dict, List, Optional, Sequence, Tuple, Union
  from hivemind.dht import DHT, DHTNode, DHTValue
  from hivemind.moe.client.expert import RemoteExpert, create_remote_experts
  from hivemind.moe.expert_uid import FLAT_EXPERT, UID_DELIMITER, UID_PATTERN, Coordinate, ExpertInfo, ExpertPrefix, ExpertUID, is_valid_uid, split_uid
  from hivemind.p2p import PeerID
  from hivemind.utils import MAX_DHT_TIME_DISCREPANCY_SECONDS, DHTExpiration, MPFuture, get_dht_time
label_desc: Use image node_id 1 to create a new DHTHandlerThread object from inherited base classes: threading with example: obj = DHTHandlerThread(module_backends, dht, update_period, expiration)