code: def test_sphere_construct_args():
      nt.assert_raises(ValueError, Sphere)
      nt.assert_raises(ValueError, Sphere, x=1, theta=1)
      nt.assert_raises(ValueError, Sphere, xyz=1, theta=1)
      nt.assert_raises(ValueError, Sphere, xyz=1, theta=1, phi=1)
  
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 1 for calling a global function with example usage: test_sphere_construct_args() without return types