code: def tearDown(self):
      shutil.rmtree(self.checkpoint_dir)
  
file_path: turicreate/src/python/turicreate/test/test_boosted_trees_checkpoint.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import turicreate
  import random
  import tempfile
  import os
  import shutil
label_desc: Use image node_id 3 for calling the BoostedTreesRegressionCheckpointTest obj's underlying member method code with example usage: obj.tearDown() without return types