code: def test_comment_read_only():
      """Raise error if comment and read_only is True."""
      with pytest.raises(ValueError, match="To access comments.+"):
          io.xlsx_cells(filename, "clean", comment=True, read_only=True)
  
imports: from pathlib import Path
  import pytest
  from openpyxl import load_workbook
  from pandas.testing import assert_series_equal
  from janitor import io
label_desc: Use image node_id 3 for calling a global function with example usage: test_comment_read_only() without return types