v0.4.9 run offline test_gail script throw venvs error

[Rocky-L]

• [X] I have marked all applicable categories:
  • [x] exception-raising bug
  • [ ] RL algorithm bug
  • [ ] documentation request (i.e. "X is missing from the documentation.")
  • [ ] new feature request
• [X] I have visited the source website
• [X] I have searched through the issue tracker for duplicates

• [X] I have mentioned version numbers, operating system and environment, where applicable:

  import tianshou, gym, torch, numpy, sys
  print(tianshou.__version__, gym.__version__, torch.__version__, numpy.__version__, sys.version, sys.platform)
  
  0.4.9 0.26.0 1.12.1 1.22.2 3.8.10 (default, Feb  9 2022, 23:36:40) 
  [Clang 13.0.0 (clang-1300.0.29.30)] darwin

Run Command:

$ python test/offline/test_gail.py

Traceback (most recent call last): File "test/offline/test_gail.py", line 232, in test_gail() File "test/offline/test_gail.py", line 202, in test_gail result = onpolicy_trainer( File "/Users/elbert.li/projects/scripts/coach/tianshou/tianshou/trainer/onpolicy.py", line 150, in onpolicy_trainer return OnpolicyTrainer(*args, **kwargs).run() File "/Users/elbert.li/projects/scripts/coach/tianshou/tianshou/trainer/base.py", line 440, in run deque(self, maxlen=0) # feed the entire iterator into a zero-length deque File "/Users/elbert.li/projects/scripts/coach/tianshou/tianshou/trainer/base.py", line 252, in iter self.reset() File "/Users/elbert.li/projects/scripts/coach/tianshou/tianshou/trainer/base.py", line 237, in reset test_result = test_episode( File "/Users/elbert.li/projects/scripts/coach/tianshou/tianshou/trainer/utils.py", line 27, in test_episode result = collector.collect(n_episode=n_episode) File "/Users/elbert.li/projects/scripts/coach/tianshou/tianshou/data/collector.py", line 304, in collect result = self.env.step(action_remap, ready_env_ids) # type: ignore File "/Users/elbert.li/projects/scripts/coach/tianshou/tianshou/env/venvs.py", line 272, in step obs, rew, done, info = self.workers[j].recv() # type: ignore ValueError: too many values to unpack (expected 4)

Any idea how to fix this issue?

[Trinkle23897]

Downgrade gym version to <=0.25

[Rocky-L]

Downgrade gym version to <=0.25

Problem Solved!