code: def test_diff_values_mixed():
      assert are_values_different(1.0, 1)
      assert are_values_different(1.0, "1")
      assert are_values_different(1, "1")
      assert are_values_different(1, None)
      assert are_values_different(np.ndarray([0]), "hey")
      assert not are_values_different(None, None)
  
file_path: nibabel/nibabel/tests/test_diff.py
imports: from os.path import abspath, dirname
  from os.path import join
  import numpy
  from nibabel.cmdline.diff import are_values_different
label_desc: Use image node_id 3 for calling a global function with example usage: test_diff_values_mixed() without return types