code: def test_fft_size(self):
      result = stft(sig_2d, window=None, fft_size=25)
      self.assertTrue(result.shape == (3, 12))
      result = stft(
          sig_2d, window=None, fft_size=25, include_nyquist=True
      )
      self.assertTrue(result.shape == (3, 13))
      # test only the first req bin
      res = [3.0 + 0.0j, 4.0 + 0.0j, 6.0 + 0.0j]
      self.assertTrue(np.allclose(result[:, 0], res))
  
imports: from __future__ import absolute_import, division, print_function
  import sys
  import unittest
  from os.path import join
  from madmom.audio.spectrogram import Spectrogram
  from madmom.audio.stft import *
  from .None import AUDIO_PATH
label_desc: Use image node_id 6 for calling the TestStftFunction obj's underlying member method code with example usage: obj.test_fft_size() without return types