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[BugFix] Raise exception in PixelObservationWrapper if env.render_mode is not specified #3076

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merged 2 commits into from
Sep 8, 2022
Merged

[BugFix] Raise exception in PixelObservationWrapper if env.render_mode is not specified #3076

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5f4a057
init
vmoens Sep 8, 2022
2be5464
amend
vmoens Sep 8, 2022
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5 changes: 2 additions & 3 deletions gym/wrappers/pixel_observation.py
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@
import numpy as np

import gym
from gym import logger, spaces
from gym import spaces

STATE_KEY = "state"

Expand Down Expand Up @@ -95,8 +95,7 @@ def __init__(

default_render_kwargs = {}
if not env.render_mode:
default_render_kwargs = {"mode": "rgb_array_list"}
logger.warn(
raise AttributeError(
"env.render_mode must be specified to use PixelObservationWrapper:"
"`gym.make(env_name, render_mode='rgb_array')`."
)
Expand Down