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PettingZoo
An API standard for multi-agent reinforcement learning environments, with popular reference environments and related utilities
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stable-baselines3
PyTorch version of Stable Baselines, reliable implementations of reinforcement learning algorithms.
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I am trying to implement a custom PettingZoo environment, and a shared policy with Stable Baselines 3. I am running into trouble with the action spaces not being compatible, since PettingZoo has started using gymnasium instead of gym. Does anyone know if these libraries no longer work together, and perhaps if there is a work-around?
I was able to get Stable Baselines 3 to work with gymnasium by following the details in this work-in-progress PR: https://github.com/DLR-RM/stable-baselines3/pull/780. I have not used PettingZoo, though.