code: def test_active_py_ipynb(ext, no_jupytext_version_number):
      check_active_cell(ext, ACTIVE_PY_IPYNB)
  
file_path: jupytext/tests/functional/others/test_active_cells.py
imports: import pytest
  from nbformat import NotebookNode
  import jupytext
  from jupytext.compare import compare, compare_cells
label_desc: Use image node_id 6 for calling a global function with example usage: test_active_py_ipynb(ext, no_jupytext_version_number) without return types