code: def tearDown(self):
      for root, dirs, files in os.walk(self.test_dir, topdown=False):
          for name in files:
              os.remove(os.path.join(root, name))
          for name in dirs:
              os.rmdir(os.path.join(root, name))
  
imports: import os
  import sys
  from io import StringIO
  from keras.testing import test_case
  from keras.utils.code_stats import count_loc
label_desc: Use image node_id 2 for calling the TestCountLoc obj's underlying member method code with example usage: obj.tearDown() without return types