code: def test_mfcc_coeffs_get_coeffs(self):
      f = filterbank(40, 512)
      coeffs = f.get_coeffs()
      self.assertIsInstance(coeffs, np.ndarray)
      assert_equal(coeffs, 0)
      assert_equal(np.shape(coeffs), (40, 512 / 2 + 1))
  
imports: import numpy
  from numpy.testing import TestCase, assert_equal, assert_almost_equal
  from aubio import cvec, filterbank, float_type
  from utils import array_from_text_file
label_desc: Use image node_id 9 for calling the aubio_filterbank_test_case obj's underlying member method code with example usage: obj.test_mfcc_coeffs_get_coeffs() without return types