code: def setUp(self):
      self.working_dir = tempfile.mkdtemp()
  
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 1 for calling the WeightTest obj's underlying member method code with example usage: obj.setUp() without return types