code: def setUpClass(cls):
      cls.save_root = os.path.join(os.path.dirname(__file__), "models")
      cls.weights_file = os.path.join(cls.save_root, "weights.h5")
      cls.params_file = os.path.join(cls.save_root, "params.json")
      if not os.path.exists(cls.save_root):
          os.mkdir(cls.save_root)
      if os.path.exists(cls.weights_file):
          os.remove(cls.weights_file)
      if os.path.exists(cls.weights_file):
          os.remove(cls.params_file)
  
file_path: anago/tests/test_model.py
imports: import os
  import shutil
  import unittest
  from anago.models import BiLSTMCRF, load_model, save_model
label_desc: Use image node_id 1 for calling the TestModel obj's underlying member method code with example usage: obj.setUpClass(cls) without return types