Description

Created function _make_env_safe(env_id, **kwargs) to check if there exists a gym.error.DeprecatedEnv. If said exception exists it checks the fallback hash map and if the env_id exists in the hash map then it uses that version else it raises an exception.

Motivation and Context

It fixes the error gymnasium.error.DeprecatedEnv: Environment version v3 for 'Taxi' is deprecated. Please use 'Taxi-v4' instead.

In the test file test_spaces.py:

Specifically tests/test_spaces.py::test_discrete_obs_space

closes #2246

• I have raised an issue to propose this change (required for new features and bug fixes)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation (update in the documentation)

Checklist

• I've read the CONTRIBUTION guide (required)
• I have updated the changelog accordingly (docs/misc/changelog.md) (required).
• My change requires a change to the documentation.
• I have updated the tests accordingly (required for a bug fix or a new feature).
• I have updated the documentation accordingly.
• I have opened an associated PR on the SB3-Contrib repository (if necessary)
• I have opened an associated PR on the RL-Zoo3 repository (if necessary)
• I have reformatted the code using make format (required)
• I have checked the codestyle using make check-codestyle and make lint (required)
• I have ensured make pytest and make type both pass. (required)
• I have checked that the documentation builds using make doc (required)