code: def tearDown(self):
      super(ImproveNasBuilderTest, self).tearDown()
      shutil.rmtree(self.test_subdirectory, ignore_errors=True)
  
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 2 for calling the ImproveNasBuilderTest obj's underlying member method code with example usage: obj.tearDown() without return types