code: def __init__(self, cluster):
      self._cluster = cluster
      self._endpoint = None
      self._session = None
  
imports: import logging
  import time
  import warnings
  import requests
  from ...session import new_session
  from .config import MarsSchedulerSpecConfig, MarsWorkerSpecConfig, MarsWebSpecConfig, MarsJobConfig
label_desc: Use image node_id 1 to create a new KubeDLClusterClient object  with example: obj = KubeDLClusterClient(cluster)