Issue on petting_zoo_api

[Dario-B0]

I get the following error only when i try to use the example for the petting_zoo_api in hello_world_pettingzoo.py :

Traceback (most recent call last):
File "/home/dario/Desktop/progetto_RL/MicroRTS-Py/hello_world_pettingzoo.py", line 76, in
main()
File "/home/dario/Desktop/progetto_RL/MicroRTS-Py/hello_world_pettingzoo.py", line 51, in main
env = PettingZooMicroRTSGridModeSharedMemVecEnv(2, 0, ai2s=opponents)
File "/home/dario/Desktop/progetto_RL/MicroRTS-Py/gym_microrts/petting_zoo_api.py", line 33, in init
super(AECEnv, self).init(
File "/home/dario/Desktop/progetto_RL/MicroRTS-Py/gym_microrts/envs/vec_env.py", line 453, in init
super(MicroRTSGridModeSharedMemVecEnv, self).init(
File "/home/dario/Desktop/progetto_RL/MicroRTS-Py/gym_microrts/envs/vec_env.py", line 144, in init
self.start_client()
File "/home/dario/Desktop/progetto_RL/MicroRTS-Py/gym_microrts/envs/vec_env.py", line 479, in start_client
from ts import JNIGridnetSharedMemVecClient as Client
ImportError: cannot import name 'JNIGridnetSharedMemVecClient' from 'tests' (unknown location)

[DennisSoemers]

I've never worked with the PettingZoo API myself, but it looks like it's trying to use MicroRTSGridModeSharedMemVecEnv instead of simply MicroRTSGridModeVecEnv. In one of his last commits before I unofficially sort of "took over", @vwxyzjn seems to have retired the shared mem env. Not sure if temporarily or permanently, see: #104 (comment)

So, I guess the obvious solution would be to switch the PettingZoo API over to using the non-shared-mem environment, but I'm not 100% sure whether this is as simple as changing the import, or if it will also require more work inside the Petting Zoo API.