Ignore deprecation warning from traverse function

[ejguan]

Since pytorch/pytorch#84079 is landed eventually, the CI for prototype tests will turn green tmrw when PyTorch nightly is updated. However, this PR introduces a FutureWarning that will deprecate only_datapipe and the default behavior of traverse will be changed as only_datapipe=True. And, this PR is suppressing this Warning turning to Error in the test.

[pmeier]

@ejguan there is only one test that currently uses only_datapipe=False:

vision/test/test_prototype_datasets_builtin.py

Lines 104 to 106 in 7046e56

	@pytest.mark.parametrize("only_datapipe", [False, True])
	@parametrize_dataset_mocks(DATASET_MOCKS)
	def test_traversable(self, dataset_mock, config, only_datapipe):

This test together with

vision/test/test_prototype_datasets_builtin.py

Line 112 in 7046e56

def test_serializable(self, dataset_mock, config):

and

vision/test/test_prototype_datasets_builtin.py

Line 125 in 7046e56

def test_data_loader(self, dataset_mock, config, num_workers):

are only there to make sure our datasets work seamlessly with all torchdata utilities and don't error or throw warnings. If only_datapipe=False is going to be deprecated, we can simply remove the parametrization here instead of ignoring the warning. cc @NicolasHug

Since you are already looking at this: do these three test still cover all utilities that might interact with our datasets from your side or should we add or remove something? 😇

[NicolasHug]

If only_datapipe=False is going to be deprecated, we can simply remove the parametrization here instead of ignoring the warning. cc @NicolasHug

I agree, ignoring the warning will make our tests break when the parameter is removed for good. We should remove its usage now instead.

[ejguan]

If only_datapipe=False is going to be deprecated, we can simply remove the parametrization here instead of ignoring the warning. cc @NicolasHug

I agree, ignoring the warning will make our tests break when the parameter is removed for good. We should remove its usage now instead.

For sure, I will do a quick update by removing only_datapipe shortly.

[pmeier]

@ejguan I took the liberty to make the changes to fix our CI.

[pmeier]

mypy failures are unrelated and will be fixed in #6652.

[NicolasHug]

Thank you both, LGTM