docstr: Connect the driver to the cluster.
docstr_tok: ["Connect","the","driver","to","the","cluster","."]
code: def connect(self, namespace=None):
      """Connect the driver to the cluster."""
      assert self.address is not None
      assert not self.connected
      output_info = ray.init(
          namespace=namespace,
          ignore_reinit_error=True,
          address=self.address,
          _redis_password=self.redis_password,
      )
      logger.info(output_info)
      self.connected = True
  
imports: import copy
  import json
  import logging
  import os
  import subprocess
  import tempfile
  import time
  from typing import Dict, Optional
  import yaml
  import ray
  import ray._private.services
  from ray._private import ray_constants
  from ray._private.client_mode_hook import disable_client_hook
  from ray._raylet import GcsClientOptions
  from ray.util.annotations import DeveloperAPI
label_desc: Use image node_id 4 for calling the Cluster obj's underlying member method code with example usage: obj.connect(namespace) without return types