code: def test_notebook(notebook_filename):
      nb, errors = _notebook_run(NOTEBOOKS_PATH + notebook_filename)
      assert errors == []
  
file_path: dowhy/tests/test_notebooks.py
imports: import os
  import subprocess
  import tempfile
  import nbformat
  import pytest
  from pytest import mark
label_desc: Use image node_id 2 for calling a global function with example usage: test_notebook(notebook_filename) without return types