Unable to convert function return value to a Python type

[TianrongChen]

Answer the following questions:

• what are you trying to do?

• what is the problem and how can it be recreated?

• what scrimmage commit are you on? You can see this with git rev-parse HEAD

• describe any changes you made to scrimmage.

• If you can recreate the issue using only plugins in the scrimmage repository, what mission file are you running?

[TianrongChen]

I tried to run the scrimmage in my project. I install scrimmage and scrimmage bind successfully, but it seems like that the problem occurred when we run the environment.
We bind the openai env in this case, and it returns a error report as following:
Traceback (most recent call last):
File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
"main", mod_spec)
File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/home/iamctr/Desktop/papers/MARL/Hierarchical-Learning-integration/submodules/evolutionary-strategies-agent/es_distributed/main.py", line 122, in
cli()
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/click/core.py", line 764, in call
return self.main(*args, **kwargs)
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/click/core.py", line 717, in main
rv = self.invoke(ctx)
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/click/core.py", line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/click/core.py", line 555, in invoke
return callback(*args, **kwargs)
File "/home/iamctr/Desktop/papers/MARL/Hierarchical-Learning-integration/submodules/evolutionary-strategies-agent/es_distributed/main.py", line 63, in master
run_master(redis_cfg, log_dir, exp)
File "/home/iamctr/Desktop/papers/MARL/Hierarchical-Learning-integration/submodules/evolutionary-strategies-agent/es_distributed/es.py", line 216, in run_master
config, env, sess, policy = setup(exp, single_threaded=False)
File "/home/iamctr/Desktop/papers/MARL/Hierarchical-Learning-integration/submodules/evolutionary-strategies-agent/es_distributed/es.py", line 165, in setup
env = create_scrimmage_env(**exp['env'])
File "/home/iamctr/Desktop/papers/MARL/Hierarchical-Learning-integration/submodules/evolutionary-strategies-agent/es_distributed/es.py", line 156, in create_scrimmage_env
return gym.make(env_id)
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/gym/envs/registration.py", line 167, in make
return registry.make(id)
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/gym/envs/registration.py", line 130, in make
max_episode_seconds=env.spec.max_episode_seconds)
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/gym/wrappers/time_limit.py", line 6, in init
super(TimeLimit, self).init(env)
File "/home/iamctr/Desktop/papers/MARL/MARL/lib/python3.6/site-packages/gym/core.py", line 243, in init
self.action_space = self.env.action_space
TypeError: Unable to convert function return value to a Python type! The signature was
(arg0: scrimmage.bindings.py_bindings.ScrimmageOpenAIEnv) -> object

Thanks!