code: def testTrain(self):
      FLAGS.problem = "tiny_algo"
      FLAGS.model = "transformer"
      FLAGS.hparams_set = "transformer_tiny"
      FLAGS.train_steps = 1
      FLAGS.eval_steps = 1
      FLAGS.output_dir = tf.test.get_temp_dir()
      FLAGS.data_dir = tf.test.get_temp_dir()
      t2t_trainer.main(None)
  
file_path: tensor2tensor/tensor2tensor/bin/t2t_trainer_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from tensor2tensor.bin import t2t_trainer
  from tensor2tensor.utils import trainer_lib_test
  import tensorflow.compat.v1
label_desc: Use image node_id 2 for calling the TrainerTest obj's underlying member method code with example usage: obj.testTrain() without return types