code: def test_change_type_unknown_option():
      df = pd.DataFrame(["a", 1, True], columns=["col1"])
      with pytest.raises(Exception):
          df = df.change_type(
              column_name="col1", dtype=float, ignore_exception="blabla"
          )
  
file_path: pyjanitor/tests/functions/test_change_type.py
imports: import numpy
  import pandas
  import pytest
  from pandas.testing import assert_frame_equal
label_desc: Use image node_id 4 for calling a global function with example usage: test_change_type_unknown_option() without return types