code: def pytest_collection_modifyitems(config, items):
      if config.getoption("--enable_notebook_tests"):
          # --enable_notebook_tests given in cli: do not skip notebook tests
          return
      else:
          enable_notebook_tests = pytest.mark.skip(
              reason="needs --enable_notebook_tests option to run"
          )
          for item in items:
              if "notebook" in item.keywords:
                  item.add_marker(enable_notebook_tests)
  
file_path: brainiak/tests/conftest.py
imports: import multiprocessing
  from mpi4py import MPI
  import pytest
  import numpy
  import random
  import tensorflow
label_desc: Use image node_id 3 for calling a global function with example usage: pytest_collection_modifyitems(config, items) without return types