code: def setUp(self):
      super(AgentVisualizerTest, self).setUp()
      self._test_subdir = os.path.join(
          "/tmp/dopamine_tests", "agent_visualizer"
      )
      shutil.rmtree(self._test_subdir, ignore_errors=True)
      os.makedirs(self._test_subdir)
  
file_path: dopamine/tests/dopamine/utils/agent_visualizer_test.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import shutil
  from absl import flags
  from dopamine.utils.agent_visualizer import AgentVisualizer
  from dopamine.utils.line_plotter import LinePlotter
  import numpy
  from PIL import Image
  import tensorflow
label_desc: Use image node_id 1 for calling the AgentVisualizerTest obj's underlying member method code with example usage: obj.setUp() without return types