code: def test_slaney(self):
      f = filterbank(40, 512)
      f.set_mel_coeffs_slaney(16000)
      a = f.get_coeffs()
      assert_equal(np.shape(a), (40, 512 / 2 + 1))
  
imports: import numpy
  from numpy.testing import TestCase, assert_equal, assert_almost_equal
  from _tools import assert_warns
  from aubio import fvec, cvec, filterbank, float_type
label_desc: Use image node_id 1 for calling the aubio_filterbank_mel_test_case obj's underlying member method code with example usage: obj.test_slaney() without return types