code: def setUp(self):
      super(ImproveNasBuilderTest, self).setUp()
      # Setup and cleanup test directory.
      self.test_subdirectory = os.path.join(
          tf.flags.FLAGS.test_tmpdir, self.id()
      )
      shutil.rmtree(self.test_subdirectory, ignore_errors=True)
      os.makedirs(self.test_subdirectory)
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  import shutil
  from absl import flags
  from absl.testing import parameterized
  import adanet
  from adanet.research.improve_nas.trainer import improve_nas
  import numpy
  import tensorflow.compat.v1
label_desc: Use image node_id 1 for calling the ImproveNasBuilderTest obj's underlying member method code with example usage: obj.setUp() without return types