code: def test_negative_window(self):
      self.assertRaises(ValueError, filterbank, 40, -20)
  
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 1 for calling the aubio_filterbank_wrong_values obj's underlying member method code with example usage: obj.test_negative_window() without return types