code: def setUpClass(cls) -> None:
      ray.init()
      # TODO(Kourosh): Hitting S3 in CI is currently broken due to some AWS
      #  credentials issues, using a local file instead for now.
  
      # cls.dset_path = "s3://air-example-data/rllib/cartpole/large.json"
      cls.dset_path = "tests/data/pendulum/large.json"
  
imports: import tempfile
  import os
  from pathlib import Path
  import unittest
  import pytest
  import ray
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig
  from ray.rllib.offline import IOContext
  from ray.rllib.offline.dataset_reader import DatasetReader, get_dataset_and_shards, _unzip_if_needed
label_desc: Use image node_id 1 for calling the TestDatasetReader obj's underlying member method code with example usage: obj.setUpClass(cls) without return types