code: def setUpClass(cls):
      cls.tempCacheDir = tempfile.TemporaryDirectory()
      yf.set_tz_cache_location(cls.tempCacheDir.name)
  
file_path: yfinance/tests/utils.py
imports: from .context import yfinance
  import unittest
  import tempfile
  import os
label_desc: Use image node_id 1 for calling the TestCache obj's underlying member method code with example usage: obj.setUpClass(cls) without return types