code: def test_vector_assign_element(self):
      a = cvec()
      a.norm[0] = 1
      assert_equal(a.norm[0], 1)
      a.phas[0] = 1
      assert_equal(a.phas[0], 1)
  
imports: import numpy
  from numpy.testing import TestCase, assert_equal
  from aubio import cvec, fvec, float_type
label_desc: Use image node_id 2 for calling the aubio_cvec_test_case obj's underlying member method code with example usage: obj.test_vector_assign_element() without return types