code: def test_change_type_fillna():
      df = pd.DataFrame(["a", 1, True], columns=["col1"])
      df = df.change_type(
          column_name="col1", dtype=float, ignore_exception="fillna"
      )
      assert np.isnan(df.col1[0])
  
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 3 for calling a global function with example usage: test_change_type_fillna() without return types