code: def test_train_pong_dqn(self):
      self._test_hparams_set("rlmf_dqn_tiny")
  
file_path: tensor2tensor/tensor2tensor/rl/trainer_model_free_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.rl import trainer_model_free
  from tensor2tensor.utils import registry
  import tensorflow.compat.v1
label_desc: Use image node_id 3 for calling the TrainTest obj's underlying member method code with example usage: obj.test_train_pong_dqn() without return types