docstr: Set up once for all tests.
docstr_tok: ["Set","up","once","for","all","tests","."]
code: def setup_class(cls):
      """Set up once for all tests."""
      cls.port_range_start = 8704
      cls.port_range_end = 8993
      cls.test_ip_local = "localhost"
      cls.test_port_local = 8994
  
file_path: responsible-ai-toolbox/rai_core_flask/tests/test_flask_helper.py
imports: import time
  import requests
  from requests.adapters import HTTPAdapter
  from requests.packages.urllib3.util.retry import Retry
  from rai_core_flask import FlaskHelper
label_desc: Use image node_id 1 for calling the TestFlaskHelper obj's underlying member method code with example usage: obj.setup_class(cls) without return types