class_docstr: Tests for RE3 exploration algorithm.
class_docstr_tok: ["Tests","for","RE3","exploration","algorithm","."]
code: def setUpClass(cls):
      ray.init()
  
file_path: ray/rllib/utils/exploration/tests/test_random_encoder.py
imports: import sys
  import unittest
  import pytest
  import ray
  from ray.rllib.utils.test_utils import framework_iterator
  import ray.rllib.algorithms.ppo
  import ray.rllib.algorithms.sac
  from ray.rllib.algorithms.callbacks import RE3UpdateCallbacks
label_desc: Use image node_id 1 for calling the TestRE3 obj's underlying member method code with example usage: obj.setUpClass(cls) without return types