code: def test_ppo_memorize_digits():
      """Test tf/ppo_memorize_digits.py with reduced batch size.
  
      This is to reduced memory consumption.
  
      """
      env = os.environ.copy()
      env["GARAGE_EXAMPLE_TEST_N_EPOCHS"] = "1"
      command = [
          EXAMPLES_ROOT_DIR / "tf/ppo_memorize_digits.py",
          "--batch_size",
          "4",
          "--max_episode_length",
          "5",
      ]
      assert (
          subprocess.run(command, check=False, env=env).returncode == 0
      )
  
imports: import os
  import pathlib
  import subprocess
  import pytest
label_desc: Use image node_id 5 for calling a global function with example usage: test_ppo_memorize_digits() without return types