Facing issue with ApptainerContainer dependency in tree_search.py

[gudurumanoj]

Hey @gurusha01 I'm unable to run the ARTS algorithm following the instructions given in README.md because of missing Apptainer dependency in MLGym

Exact error:

"PAR_PATH/arts/arts/tree_search.py", line 36, in <module>
    from mlgym.environment.utils import ApptainerContainer
ImportError: cannot import name 'ApptainerContainer' from 'mlgym.environment.utils'

I checked the code at mlgym.environment.utils here and couldn't find any references to Apptainer.

It'd be of great help if resolution to this issue can be provided!

Thanks in advance!