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Fix Atari environment issues (#289) #438

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Fix Atari environment issues (#289) #438

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9ef4c7b
fix atari env issues - import path, ale-py version, dynamic workers
jacobarrio Dec 22, 2025
532799a
fix auto worker detection to use CPU cores instead of num_envs
jacobarrio Dec 28, 2025
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2 changes: 1 addition & 1 deletion pufferlib/config/atari.ini
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Expand Up @@ -8,7 +8,7 @@ rnn_name = Recurrent

[vec]
num_envs = 128
num_workers = 16
num_workers = auto
batch_size = 64

[train]
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2 changes: 1 addition & 1 deletion pufferlib/environments/atari/environment.py
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Expand Up @@ -16,7 +16,7 @@ def make(name, obs_type='grayscale', frameskip=4,
repeat_action_probability=0.0, render_mode='rgb_array',
buf=None, seed=0):
'''Atari creation function'''
pufferlib.environments.try_import('ale_py', 'AtariEnv')
pufferlib.environments.try_import('ale_py')

ale_render_mode = render_mode
if render_mode == 'human':
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3 changes: 2 additions & 1 deletion pufferlib/vector.py
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Expand Up @@ -640,7 +640,8 @@ def make(env_creator_or_creators, env_args=None, env_kwargs=None, backend=Puffer

if 'num_workers' in kwargs:
if kwargs['num_workers'] == 'auto':
kwargs['num_workers'] = num_envs
import psutil
kwargs['num_workers'] = min(psutil.cpu_count(logical=False), num_envs)

# TODO: None?
envs_per_worker = num_envs / kwargs['num_workers']
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2 changes: 1 addition & 1 deletion pyproject.toml
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Expand Up @@ -39,7 +39,7 @@ avalon = [
atari = [
'gymnasium[accept-rom-license]==0.29.1',
'opencv-python==3.4.17.63',
'ale_py==0.9.0',
'ale_py==0.10.1',
]

box2d = [
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