code: def test_sphere_phi():
      atol = 1e-16
      north_hemisphere = pv.Sphere(start_phi=0, end_phi=90)
      assert np.all(
          north_hemisphere.points[:, 2] >= -atol
      )  # north is above XY plane
      south_hemisphere = pv.Sphere(start_phi=90, end_phi=180)
      assert np.all(south_hemisphere.points[:, 2] <= atol)
  
imports: from itertools import permutations
  import re
  import numpy
  import pytest
  import pyvista
label_desc: Use image node_id 7 for calling a global function with example usage: test_sphere_phi() without return types