code: def test_linspace_equivalence(self):
      y, st = np.linspace(2, 10, retstep=True)
      assert_almost_equal(st, 8 / 49.0)
      assert_array_almost_equal(y, mgrid[2:10:50j], 13)
  
imports: import functools
  from unittest import expectedFailure, skipIf
  from pytest import raises
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, parametrize, run_tests, TEST_WITH_TORCHDYNAMO, TestCase, xpassIfTorchDynamo
label_desc: Use image node_id 2 for calling the TestGrid obj's underlying member method code with example usage: obj.test_linspace_equivalence() without return types