how to fix environment error in open-ai gym?

user_11689548 0
Viewed 7088

code:

import gym
env = gym.make('Breakout-v0')

I get an error:

Traceback (most recent call last):
File "C:/Users/danie/Downloads/Programming/Python/Programming/Pycharm/app.py", line 40, in 
gym.make("Breakout-v0")
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\site-packages\gym\envs\registration.py", line 156, in make
return registry.make(id, **kwargs)
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\site-packages\gym\envs\registration.py", line 101, in make
env = spec.make(**kwargs)
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\site-packages\gym\envs\registration.py", line 72, in make
cls = load(self.entry_point)
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\site-packages\gym\envs\registration.py", line 17, in load
mod = importlib.import_module(mod_name)
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\importlib_init.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "", line 1006, in _gcd_import
File "", line 983, in _find_and_load
File "", line 967, in find_and_load_unlocked
File "", line 677, in load_unlocked
File "", line 728, in exec_module
File "", line 219, in call_with_frames_removed
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\site-packages\gym\envs\atari_init.py", line 1, in 
from gym.envs.atari.atari_env import AtariEnv
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\site-packages\gym\envs\atari\atari_env.py", line 9, in 
import atari_py
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\site-packages\atari_py_init.py", line 1, in 
from .ale_python_interface import *
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\site-packages\atari_py\ale_python_interface.py", line 18, in 
'ale_interface/build/ale_c.dll'))
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\ctypes_init.py", line 434, in LoadLibrary
return self.dlltype(name)
File "C:\Users\danie\AppData\Local\Programs\Python\Python37\lib\ctypes_init.py", line 356, in init
self._handle = _dlopen(self._name, mode)
OSError: [WinError 126] The specified module could not be found
openai-gym python
4 Answers
user_126736940

I have tried to make it work with python 3.8 and 3.9 on Windows 10. Installing Python 3.7 and using it as the Python Interpreter on PyCharm resolved the issue. I have searched for the missing file while having 3.8 + version of Python and it did not exist at all. Atari-py is supported only for Python 3.7 (https://github.com/openai/atari-py) so having a higher version of that would not work. It is a bad idea to download files from unlicensed places so I advise you to install the supported version of Python (3.5, 3.6, and 3.7). Even though gym can work on 3.9 the atari version will not. I did not need anything else installed (although I may have Microsoft Visual C++ Build Tools, but I deff did not need Xming), just import gym 0.18.0, pyglet 1.5.0, atari -py 0.2.6

user_93922770

Welcome to SO. If you trace the exception trace you see that a shared object loading function is called in ctypes' init.py file aliased as dlopen. On Windows, this correponds to WINAPI's LoadLibrary method. LoadLibrary is trying to load ale_c.dll. ALE is 'arcade learning environment'.

Search your computer for ale_c.dll or libale_c.dll

If you have ale_c.dll (most likely you are on Windows), refer to this answer to see how DLL's loaded with ctypes are basically LoadLibrary calls as I mentioned. It mentions all the stuff about DLL loading order etc. but, if you need a quick way around this, copy your dll under system32 folder.

user_116663910

I had similar issue with Atari-Pacman. It is resolved by downloading atari_py-1.2.1-cp37-cp37m-win_amd64 which is for 64-bit Python 3.7, and installing it by using pip.

user_118709560
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