code: def setUp(self, num_processes, use_gae, discrete):
      self.num_processes = num_processes
      self.use_gae = use_gae
      self.discrete = discrete
      self.tmpdir = tempfile.mkdtemp()
      self.agent_dirname = os.path.join(self.tmpdir, "agent_final")
  
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 1 for calling the TestA2C obj's underlying member method code with example usage: obj.setUp(num_processes, use_gae, discrete) without return types