code: def test_change_type(dataframe):
      df = dataframe.change_type(column_name="a", dtype=float)
      assert df["a"].dtype == float
  
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 1 for calling a global function with example usage: test_change_type(dataframe) without return types