安装Atari环境报错缺少ale_c.dll解决办法

背景：

在Atari游戏环境中做RL测试。通过anaconda新建了环境，配置好torch，numpy，gym等环境。运行中报错如下：

1	FileNotFoundError: Could not find module 'D:\Anaconda3\envs\PPOenv\lib\site-packages\atari_py\ale_interface\ale_c.dll' (or one of its dependencies). Try using the full path with constructor syntax.

意思是所显示路径下缺少ale_c.dll

处理方法：

方法1（对我情况无效，但点赞很多）

首先检索到了这个方案（作者@razzzu）

https://github.com/openai/gym/issues/1726

Step1: 卸载相关库

1 2	pip uninstall atari-py pip uninstall gym[atari]

Step2: 安装 VS build tools工具

Download VS build tools here: https://visualstudio.microsoft.com/thank-you-downloading-visual-studio/?sku=BuildTools&rel=16

运行后勾选左侧“C++ build tools”以及右侧的

MSVC v142-VS 2019 C++ x64/x86 build tools
windows 10 SDK
C++ CMaKer
Testing tools core features - build tools

Step3: 重启电脑

Step4: 重新安装库

Install cmake, atari-py and gym
pip install cmake
pip install atari-py
pip install gym[atari]

Step5: 运行测试

1
2
3

Now run the following code:
import atari_py
print(atari_py.list_games())

and if everything worked then it should return a list of all games as shown below

['adventure', 'air_raid', 'alien', 'amidar', 'assault', 'asterix', 'asteroids', 'atlantis', 'bank_heist', 'battle_zone', 'beam_rider', 'berzerk', 'bowling', 'boxing', 'breakout', 'carnival', 'centipede', 'chopper_command', 'crazy_climber', 'defender', 'demon_attack', 'double_dunk', 'elevator_action', 'enduro', 'fishing_derby', 'freeway', 'frostbite', 'gopher', 'gravitar', 'hero', 'ice_hockey', 'jamesbond', 'journey_escape', 'kaboom', 'kangaroo', 'krull', 'kung_fu_master', 'montezuma_revenge', 'ms_pacman', 'name_this_game', 'phoenix', 'pitfall', 'pong', 'pooyan', 'private_eye', 'qbert', 'riverraid', 'road_runner', 'robotank', 'seaquest', 'skiing', 'solaris', 'space_invaders', 'star_gunner', 'tennis', 'time_pilot', 'tutankham', 'up_n_down', 'venture', 'video_pinball', 'wizard_of_wor', 'yars_revenge', 'zaxxon']

我在完成上述步骤后发现还是缺少ale_c.dll，于是打算直接下载一个ale_c.dll

方法2 （有效）

根据stackoverflow上的方法

Step1: Download ale_c.dll from here.(下载需要梯子，我在博客img中放了文件备份) Step2: Copy it in C:Raval-packages_py_interface (Your path can be different).

成功解决问题！