code: def test_vector_assign_element_end(self):
      a = fvec(default_size)
      a[-1] = 1
      assert_equal(a[-1], 1)
      assert_equal(a[len(a) - 1], 1)
  
imports: import numpy
  from numpy.testing import TestCase, assert_equal, assert_almost_equal
  from aubio import fvec, zero_crossing_rate, alpha_norm, min_removal
  from aubio import float_type
label_desc: Use image node_id 4 for calling the aubio_fvec_test_case obj's underlying member method code with example usage: obj.test_vector_assign_element_end() without return types