docstr: make sure set_triangle_bands works when list starts with 0
docstr_tok: ["make","sure","set_triangle_bands","works","when","list","starts","with","0"]
code: def test_triangle_freqs_with_zeros(self):
      """make sure set_triangle_bands works when list starts with 0"""
      freq_list = [0, 40, 80]
      freqs = np.array(freq_list, dtype=float_type)
      f = filterbank(len(freqs) - 2, 1024)
      f.set_triangle_bands(freqs, 48000)
      assert_equal(f(cvec(1024)), 0)
      self.assertIsInstance(f.get_coeffs(), np.ndarray)
  
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 5 for calling the aubio_filterbank_mel_test_case obj's underlying member method code with example usage: obj.test_triangle_freqs_with_zeros() without return types