code: def setUpClass(cls):
      cls.badly_formatted_files = list()
      cls.files_2_test = list_all_py_files()
  
file_path: TensorLayer/tests/pending/test_yapf_format.py
imports: import sys
  import unittest
  from yapf.yapflib.yapf_api import FormatCode
  from tests.utils import CustomTestCase, list_all_py_files
label_desc: Use image node_id 1 for calling the YAPF_Style_Test obj's underlying member method code with example usage: obj.setUpClass(cls) without return types