code: def setUpClass(cls):
      env_config_path = os.path.abspath(
          os.path.join(
              os.path.dirname(__file__), "..", "..", "..", ".env"
          )
      )
      load_dotenv(env_config_path)
  
file_path: nlpaug/test/augmenter/word/test_tfidf.py
imports: import unittest
  import os
  import re
  from dotenv import load_dotenv
  import sklearn.datasets
  import nlpaug.augmenter.word
  import nlpaug.model.word_stats
  from nlpaug.util import Action
label_desc: Use image node_id 1 for calling the TestTfIdf obj's underlying member method code with example usage: obj.setUpClass(cls) without return types