No registered env with id: PongNoFrameskip-v4

[Elmahedi]

Please, I have the following issue while trying to run main_dueling_ddqn.py

[philtabor]

First, I would make sure you did pip install gym[atari]. If that fails, then I recommend trying the advice in this thread:

openai/gym#1218

You'll need a compiler to build the binaries from source.

The other option is to use gym-retro and download the Atari roms from the internet archive.

[steelep]

If anyone else is having this issue, use an environment with Python 3.7 (yes I know notes say 3.6, but this doesnt break anything afaik), and run pip install gym[atari,accept-rom-license]==0.21