code: def test_abc_cpu(self):
      self._test_abc()
      self._test_abc(steps=0, load_model=True)
  
imports: import os
  import tempfile
  import numpy
  import pytest
  import torch
  from torch import nn
  import pfrl
  from pfrl.agents.a2c import A2C
  from pfrl.envs.abc import ABC
  from pfrl.experiments.evaluator import batch_run_evaluation_episodes
  from pfrl.nn import Branched
  from pfrl.policies import GaussianHeadWithStateIndependentCovariance, SoftmaxCategoricalHead
label_desc: Use image node_id 2 for calling the TestA2C obj's underlying member method code with example usage: obj.test_abc_cpu() without return types