code: def test_assign_cvec_norm_slice(self):
      spec = cvec(1024)
      spec.norm[40:100] = 100
      assert_equal(spec.norm[0:40], 0)
      assert_equal(spec.norm[40:100], 100)
      assert_equal(spec.norm[100:-1], 0)
      assert_equal(spec.phas, 0)
  
imports: import numpy
  from numpy.testing import TestCase, assert_equal
  from aubio import cvec, fvec, float_type
label_desc: Use image node_id 4 for calling the aubio_cvec_test_case obj's underlying member method code with example usage: obj.test_assign_cvec_norm_slice() without return types