ethos first commit
> Nice thanks !
> 
> I left a few comments
> 
> Also it looks like this PR includes changes about other files than the ones for ethos
> 
> Can you create another branch and another PR please ?

@lhoestq Should I close this PR? The new one is the: #1453 You can create another PR and close this one if you don't mind > You can create another PR and close this one if you don't mind

Perfect! You should see the #1453 PR for the fixed version! Thanks
Ethos passed all the tests except from this one: 
RUN_SLOW=1 pytest tests/test_dataset_common.py::LocalDatasetTest::test_load_dataset_all_configs_<your-dataset-name>

with this error: 
E               OSError: Cannot find data file. 
E               Original error:
E               [Errno 2] No such file or directory: 