cannot visualize result when testing mujoco

[zks204]

I installed gym, mujoco version 2.10, with either py37 & py38, pyglet version downgrade to 1.2.4. When testing with trained policy, if I set render=0.03, env.render() will raise NotImplementedError which doesn't allow me to visualize the result. However, if I set render=0 with no visualization, the program runs successfully. Please help take a look, very appreciate!

[Trinkle23897]

https://github.com/thu-ml/tianshou/blob/e7c2c3711eb4f4430ff36e6df1cf8630714815ad/examples/mujoco/mujoco_env.py#L13-L37

I guess your program ran into the first case using envpool. EnvPool doesn't support rendering results because of thgoughput concerns. You can either uninstall envpool or change the above code to let it fall into the second case using ShmemVectorEnv.

[MischaPanch]

Resolved