code: def test_value(self):
      # empty sequences
      matches = find_closest_matches([], [])
      self.assertTrue(np.allclose(matches, []))
      # detections relative to annotations
      matches = find_closest_matches(DETECTIONS, ANNOTATIONS)
      self.assertTrue(np.allclose(matches, MATCHES))
      # annotations relative to detections
      matches = find_closest_matches(ANNOTATIONS, DETECTIONS)
      correct = np.asarray([0, 1, 2, 3, 3, 3, 4])
      self.assertTrue(np.allclose(matches, correct))
  
imports: from __future__ import absolute_import, division, print_function
  import math
  import unittest
  from collections import OrderedDict
  from madmom.evaluation import *
label_desc: Use image node_id 2 for calling the TestFindClosestMatchesFunction obj's underlying member method code with example usage: obj.test_value() without return types