code: def setUpClass(cls):
      super(DFUtilTest, cls).setUpClass()
  
      # define model_dir and export_dir for tests
      cls.tfrecord_dir = os.getcwd() + os.sep + "test_tfr"
  
file_path: TensorFlowOnSpark/tests/test_dfutil.py
imports: import os
  import shutil
  import test
  import unittest
  from tensorflowonspark import dfutil
label_desc: Use image node_id 1 for calling the DFUtilTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types