Let's put Neptune fix here and try to fix RL example as well once we understand the root of the issue.

@louis-she can you please disable neptune tests such that we could merge this PR.

Do you think this version pin is necessary ?

gym==0.26.2

the root cause of the 2 errors, one from neptune-client and one from gym, is the version resolve conflicts of the 2 packages.
If install with neptune-client==0.16.11 gym==0.26.2 , error will raised:

ERROR: Cannot install gym==0.26.2 and neptune-client==0.16.11 because these package versions have conflicting dependencies.

The conflict is caused by:
    neptune-client 0.16.11 depends on importlib-metadata<4; python_version < "3.8.0"
    gym 0.26.2 depends on importlib-metadata>=4.8.0; python_version < "3.10"

To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict

ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies

The pip install will resolve the conflicts by get the older version of gym, and that's why the CI failed with gym. The gym is resolved to version 0.20.0 (since we do not ping the version of gym). And that will lead to the seed error.

Thanks for the explanation @louis-she !

I would suggest to temporarily comment out neptune dependency in requirements-dev.txt and add

pytest.skip("Temporarily skip neptune tests", allow_module_level=True)

into https://github.com/pytorch/ignite/blob/master/tests/ignite/contrib/handlers/test_neptune_logger.py to avoid failures.

Once neptune folks updated our code to their latest API version and also fix the issue with importlib-metadata we can reenable the tests. What do you think ?

EDIT: or keep your solution with downgraded neptune-client version, I like that as well !

I fixed the version of neptune to the last version before they did the legacy refactoring and leave the neptune test as it was in the past. Thus gym can be automatically resolved to the latest version 0.26.2 and pass the CI.