code: def test_convert_excel_date_with_string_data():
      """Raises ValueError if values of column are not numeric"""
      df = pd.read_excel(
          Path(pytest.EXAMPLES_DIR) / "notebooks" / "dirty_data.xlsx",
          engine="openpyxl",
      ).clean_names()
  
      with pytest.raises(ValueError):
          df.convert_excel_date("certification")
  
imports: from pathlib import Path
  import pandas
  import pytest
label_desc: Use image node_id 2 for calling a global function with example usage: test_convert_excel_date_with_string_data() without return types