Not able to install custom environments

[pablovin]

Dear all,

I am having a problem when trying to use custom environments. I first tried to create mine and got the problem. Then I tried to use existing custom environments and got the same problem.

I am running python3 over a virtual environment.

I am using this as an example and as a reference for the error: https://github.com/nczempin/gym-tic-tac-toe

The custom environment installed without an error:

Installing collected packages: gym-tic-tac-toe
Running setup.py develop for gym-tic-tac-toe
Successfully installed gym-tic-tac-toe

but when I try to create it, I get the message it is not found:

gym.error.UnregisteredEnv: No registered env with id: tic_tac_toe-v1

Also running through the installed environments, I get nothing:

python3 -c "import gym; print(sorted([env.id for env in gym.envs.registry.all() if 'tictac' in env.id])); print(gym.file)"
[]
/home/pablo/Documents/VirtualEnv/EmotionRecognition/lib/python3.6/site-packages/gym/init.py

Would any of you have experienced this before? Does anyone have any idea of what the problem can be?

thanks in advance!

Pablo

[fkdosilovic]

I've had a similar problem (also on third-party environment) and solved it by following instructions from Issue 626 - How to make environment. Basically, the solution is to import the package where the environment is located. Do not forget to read the note at the end about PYTHONPATH!

[christopherhesse]

You need to either import <name of your package> or do gym.make("<name of your package>:tic_tac_toe-v1"), see the creating environment guide for more information: https://github.com/openai/gym/blob/master/docs/creating-environments.md

[kncrane]

Hello,

I am getting the same error message and I don't understand what I am doing wrong as everything seems to be as described here, at #626 , and at creating-environments.md

I have a private github repo called gym-gridworld with the exact same structure and content as provided in creating-environments.md but with added code to gridworld_env.py to give implementations to def step, def reset etc.

From the terminal I cloned the repo into a project folder on my laptop, cd into project folder, pipenv shell into my virtual environment, cd into gym-gridworld, and called pip install e . which returned 'Successfully installed e-1.4.5 gym-gridworld-0.0.1' and gym_gridworld appears when I call pip list

From there (so still within gym-gridworld directory) I call python, import gym, and then env = gym.make('gym_gridworld:gridworld-v0') and get same error as @pablovin . The error is thrown from line 86 of python3.6/site-packages/gym/envs/registration.py (NB that this is the install of python 3.6 within my virtualenv) which is spec = self.spec(path). Adding import gym_gridworld doesn't help.

I'm on Linux Ubuntu
Python 3.6.9
gym == 0.16.0

Any idea what is amiss? Thanks,
Kirsten

[kncrane]

Just to give more info, when I'm within the gym-gridworld directory and call import gym_gridworld it doesn't complain but then when I call gym.make I get ..

Traceback (most recent call last):
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/site-packages/gym/envs/registration.py", line 118, in spec
    return self.env_specs[id]
KeyError: 'gridworld-v0'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/site-packages/gym/envs/registration.py", line 142, in make
    return registry.make(id, **kwargs)
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/site-packages/gym/envs/registration.py", line 86, in make
    spec = self.spec(path)
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/site-packages/gym/envs/registration.py", line 128, in spec
    raise error.UnregisteredEnv('No registered env with id: {}'.format(id))
gym.error.UnregisteredEnv: No registered env with id: gridworld-v0

However when I cd .. up a level to my project directory (the parent directory of gym-gridworld), trying to import gym_gridworld returns ...

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'gym_gridworld'

and the gym.make error is slightly different ...

Traceback (most recent call last):
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/site-packages/gym/envs/registration.py", line 106, in spec
    importlib.import_module(mod_name)
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 953, in _find_and_load_unlocked
ModuleNotFoundError: No module named 'gym_gridworld'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/site-packages/gym/envs/registration.py", line 142, in make
    return registry.make(id, **kwargs)
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/site-packages/gym/envs/registration.py", line 86, in make
    spec = self.spec(path)
  File "/home/campus.ncl.ac.uk/b3024896/.local/share/virtualenvs/stable_baselines-ocA6ek_u/lib/python3.6/site-packages/gym/envs/registration.py", line 109, in spec
    raise error.Error('A module ({}) was specified for the environment but was not found, make sure the package is installed with `pip install` before calling `gym.make()`'.format(mod_name))
gym.error.Error: A module (gym_gridworld) was specified for the environment but was not found, make sure the package is installed with `pip install` before calling `gym.make()`

[kncrane]

Doesn't matter my two init.py files had single underscores instead of double so they weren't even running. No words.