code: def test_conversion(self):
      # conversion from list of lists should work
      e = NoteEvaluation([[0, 0]], [[0, 0]])
      self.assertIsInstance(e.tp, np.ndarray)
      self.assertIsInstance(e.fp, np.ndarray)
      self.assertIsInstance(e.tn, np.ndarray)
      self.assertIsInstance(e.fn, np.ndarray)
  
imports: from __future__ import absolute_import, division, print_function
  import math
  import unittest
  from madmom.evaluation.notes import *
  from .None import ANNOTATIONS_PATH, DETECTIONS_PATH
label_desc: Use image node_id 2 for calling the TestNoteEvaluationClass obj's underlying member method code with example usage: obj.test_conversion() without return types