code: def tearDown(self):
      if os.path.exists(self.working_dir):
          shutil.rmtree(self.working_dir)
  
file_path: coremltools/coremltools/test/blob/test_weights.py
imports: import os
  import shutil
  import tempfile
  import unittest
  import numpy
  from coremltools.libmilstoragepython import _BlobStorageReader
  from coremltools.libmilstoragepython import _BlobStorageWriter
label_desc: Use image node_id 2 for calling the WeightTest obj's underlying member method code with example usage: obj.tearDown() without return types