class_docstr: Coordinator of n (possibly remote) Learner workers.
  
  Each Learner worker has a copy of the RLModule, the loss function(s), and
  one or more optimizers.
class_docstr_tok: ["Coordinator","of","n","(","possibly","remote",")","Learner","workers",".","Each","Learner","worker","has","a","copy","of","the","RLModule",",","the","loss","function","(","s",")",",","and","one","or","more","optimizers","."]
docstr: Returns this process's address.
  
  Args:
      _: Unused arg. Exists to make this function compatible with foreach_actor
      calls.
  
  Returns:
      The address of this process.
docstr_tok: ["Returns","this","process","'s","address",".","Args",":","_",":","Unused","arg",".","Exists","to","make","this","function","compatible","with","foreach_actor","calls",".","Returns",":","The","address","of","this","process","."]
code: def _get_ip_address(_=None) -> str:
      """Returns this process's address.
  
      Args:
          _: Unused arg. Exists to make this function compatible with foreach_actor
          calls.
  
      Returns:
          The address of this process.
  
      """
      import ray
  
      return ray.util.get_node_ip_address()
  
imports: from collections import defaultdict, Counter
  from functools import partial
  import pathlib
  from typing import Any, Callable, Dict, List, Optional, Set, Type, Union
  import uuid
  import ray
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig
  from ray.rllib.core.learner.learner import Learner
  from ray.rllib.core.learner.reduce_result_dict_fn import _reduce_mean_results
  from ray.rllib.core.rl_module.rl_module import SingleAgentRLModuleSpec, RLMODULE_STATE_DIR_NAME
  from ray.rllib.policy.sample_batch import MultiAgentBatch
  from ray.rllib.utils.actor_manager import FaultTolerantActorManager
  from ray.rllib.utils.deprecation import Deprecated, deprecation_warning
  from ray.rllib.utils.minibatch_utils import ShardBatchIterator, ShardEpisodesIterator
  from ray.rllib.utils.numpy import convert_to_numpy
  from ray.rllib.utils.typing import EpisodeType, ModuleID, ResultDict, RLModuleSpec, ShouldModuleBeUpdatedFn
  from ray.train._internal.backend_executor import BackendExecutor
  from ray.tune.utils.file_transfer import sync_dir_between_nodes
  from ray.util.annotations import PublicAPI
label_desc: Use image node_id 25 for calling the LearnerGroup obj's underlying member method code with example usage: obj._get_ip_address(_) and returns: ray