code: def test_sphere_attrs():
      s = Sphere(xyz=verts)
      nt.assert_array_almost_equal(s.vertices, verts)
      nt.assert_array_almost_equal(s.x, verts[:, 0])
      nt.assert_array_almost_equal(s.y, verts[:, 1])
      nt.assert_array_almost_equal(s.z, verts[:, 2])
  
imports: import numpy
  import numpy.testing
  import pytest
  import warnings
  from dipy.core.sphere import Sphere, HemiSphere, unique_edges, unique_sets, faces_from_sphere_vertices, disperse_charges, fibonacci_sphere, disperse_charges_alt, _get_forces, _get_forces_alt, unit_octahedron, unit_icosahedron, hemi_icosahedron
  from dipy.core.geometry import cart2sphere, vector_norm
  from dipy.core.sphere_stats import random_uniform_on_sphere
  from dipy.utils.optpkg import optional_package
label_desc: Use image node_id 10 for calling a global function with example usage: test_sphere_attrs() without return types