gym.error.NameNotFound: Environment Pong doesn't exist in namespace ALE.

[wenzhangliu]

When I run a demo of Atari after correctly installing xuance, it raises an error:

raise error.NameNotFound( gym.error.NameNotFound: Environment Pong doesn't exist in namespace ALE.

[wenzhangliu]

This issue can be solved by running

pip install gym[accept-rom-license]

[ToiLaKiet]

i'm trying to implement the Pong-v0 environment, i have already done your method but nothing happens can you show me what i should do next? raise error.NameNotFound( f"Environment {name} doesn't exist{namespace_msg}. {suggestion_msg}" This is the bug i have encountered.

[wenzhangliu]

You can try to use "ALE/Pong-v5" as the env_id.

[ToiLaKiet]

Can you elaborate on ALE namespace? What is the module so that I can import it. I'm sorry for asking such questions because I am quite new to this. In addition, I would rather use Pong-v0 as my code works within its structure. Thank you a lot.

[wenzhangliu]

I mean, you can use "ALE/Pong-v5" instead of "Pong-v0". For example:

env = gym.make("ALE/Pong-v5")  

However, this depends on the version of Gym you're using.