code: def setUpClass(cls):
      os.environ["SPHINXBUILD"] = "1"
  
file_path: TensorLayer/tests/pending/test_documentation.py
imports: import os
  import unittest
  from sphinx.application import Sphinx
label_desc: Use image node_id 1 for calling the DocTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types