code: def test_n_rotations():
      dcm = np.empty((2, 3, 3))
      dcm[0] = np.array([[0, -1, 0], [1, 0, 0], [0, 0, 1]])
      dcm[1] = np.array([[1, 0, 0], [0, 0, -1], [0, 1, 0]])
      r = Rotation.from_dcm(dcm)
  
      assert_equal(len(r), 2)
      assert_equal(len(r[0]), 1)
      assert_equal(len(r[1]), 1)
      assert_equal(len(r[:-1]), 1)
  
imports: from __future__ import division, print_function, absolute_import
  import pytest
  import numpy
  from numpy.testing import assert_equal, assert_array_almost_equal
  from numpy.testing import assert_allclose
  from scipy.spatial.transform import Rotation, Slerp
  from scipy.stats import special_ortho_group
  from itertools import permutations
label_desc: Use image node_id 46 for calling a global function with example usage: test_n_rotations() without return types