code: def tearDown(self):
      for i in range(5):
          try:
              shutil.rmtree(self.working_directory)
          except Exception:
              pass
  
file_path: auto-sklearn/test/test_scripts/test_metadata_generation.py
imports: import json
  import os
  import random
  import shutil
  import socket
  import subprocess
  import tempfile
  import arff
  import numpy
  from autosklearn.metrics import CLASSIFICATION_METRICS, REGRESSION_METRICS
  import unittest
label_desc: Use image node_id 4 for calling the TestMetadataGeneration obj's underlying member method code with example usage: obj.tearDown() without return types