code: def _generate_octahedron():
      return np.array(
          [
              [-1, 0, 0],
              [+1, 0, 0],
              [0, -1, 0],
              [0, +1, 0],
              [0, 0, -1],
              [0, 0, +1],
          ]
      )
  
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 3 for calling a global function with example usage: _generate_octahedron() and returns: np