code: def test_time_signature(self):
      midi = MIDIFile(pj(ANNOTATIONS_PATH, "stereo_sample.mid"))
      self.assertTrue(np.allclose(midi.time_signatures, [[0, 4, 4]]))
  
imports: from __future__ import absolute_import, division, print_function
  import os
  import tempfile
  import unittest
  from os.path import join
  from madmom.io.midi import *
  from .None import ANNOTATIONS_PATH
label_desc: Use image node_id 7 for calling the TestMIDIFileClass obj's underlying member method code with example usage: obj.test_time_signature() without return types