code: def pytest_sessionstart(session):
      """
      Called after the Session object has been created and
      before performing collection and entering the run test loop.
      """
      os.environ["NO_EXTERNAL_ONLY_APIS"] = "1"
      os.environ["_CUDF_TEST_ROOT"] = _CURRENT_DIRECTORY
  
imports: import itertools
  import os
  import pathlib
  import cupy
  import numpy
  import pytest
  import rmm
  import cudf
  from cudf.testing._utils import assert_eq
label_desc: Use image node_id 8 for calling a global function with example usage: pytest_sessionstart(session) without return types