code: def test_writeability(self):
      # See gh-7269
      x, y = np.unravel_index([1, 2, 3], (4, 5))
      assert_(x.flags.writeable)
      assert_(y.flags.writeable)
  
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 6 for calling the TestRavelUnravelIndex obj's underlying member method code with example usage: obj.test_writeability() without return types