code: def test_chords(self):
      # test whether the chords() function creates a proper array of
      # chords
      labels = ["F", "C:maj", "D:(1,b3,5)", "Bb:maj7"]
      for lbl, crd in zip(labels, chords(labels)):
          self.assert_chord_equal(chord(lbl), crd)
  
imports: from __future__ import absolute_import, division, print_function
  import unittest
  from os.path import join
  from madmom.evaluation.chords import *
  from .None import ANNOTATIONS_PATH, DETECTIONS_PATH
label_desc: Use image node_id 9 for calling the TestChordParsing obj's underlying member method code with example usage: obj.test_chords() without return types