gym-http-api
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Published
20 hours ago •
openai
openai
Tuple Spaces do not convert to json properly
Hi. Thanks for making gym available to other languages. I'm currently seeing an error when trying to reset the Blackjack-v0 environment. Here's a reproducible example using curl
# start the server
python gym_http_server.py
# create blackjack instance
curl -d '{"env_id":"Blackjack-v0"}' -H "Content-Type: application/json" -X POST http://127.0.0.1:5000/v1/envs/
# reset instance
curl -X POST http://127.0.0.1:5000/v1/envs/<instance_id>/reset/
The issue I believe is caused when calling env.observation_space.to_jsonable(obs) in reset(). The to_jsonable method expects a list of tuples for Blackjack, not a single tuple.
My current workaround is to check to see if the observation is a tuple and if so, wrap it a list first. This works fine for Blackjack but I haven't tested the other environments.
def reset(self, instance_id):
env = self._lookup_env(instance_id)
obs = env.reset()
if (isinstance(obs, tuple)):
obs = [obs]
return env.observation_space.to_jsonable(obs)
Submitted a PR, but I don't even know if this repo is still being maintained...
