code: def test_a_weighting(self):
      expected = array_from_text_file(
          "a_weighting_test_simple.expected"
      )
      f = digital_filter(7)
      f.set_a_weighting(44100)
      v = fvec(32)
      v[12] = 0.5
      u = f(v)
      assert_almost_equal(expected[1], u)
  
file_path: aubio/python/tests/test_filter.py
imports: from numpy.testing import TestCase, assert_equal, assert_almost_equal
  from aubio import fvec, digital_filter
  from utils import array_from_text_file
label_desc: Use image node_id 5 for calling the aubio_filter_test_case obj's underlying member method code with example usage: obj.test_a_weighting() without return types