code: def test_cho_factor(self):
      assert_no_overwrite(cho_factor, [(3, 3)])
  
imports: from numpy.testing import assert_array_almost_equal, assert_array_equal
  from pytest import raises
  from numpy import array, transpose, dot, conjugate, zeros_like, empty
  from numpy.random import random
  from scipy.linalg import cholesky, cholesky_banded, cho_solve_banded, cho_factor, cho_solve
  from scipy.linalg._testutils import assert_no_overwrite
label_desc: Use image node_id 2 for calling the TestOverwrite obj's underlying member method code with example usage: obj.test_cho_factor() without return types