code: def test_old_radius_api_error(self):
      with pytest.raises(ValueError, match="`radius` is `None`. *"):
          SphericalVoronoi(self.points, radius=None)
  
imports: import numpy
  import itertools
  from numpy.testing import assert_equal, assert_almost_equal, assert_array_equal, assert_array_almost_equal
  import pytest
  from pytest import raises
  from scipy.spatial import SphericalVoronoi, distance
  from scipy.optimize import linear_sum_assignment
  from scipy.constants import golden
  from scipy.special import gamma
label_desc: Use image node_id 5 for calling the TestSphericalVoronoi obj's underlying member method code with example usage: obj.test_old_radius_api_error() without return types