python各种BUG报错解决

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Could not build atari-py: Command '['cmake', '..']' returned non-zero exit status 1..
 (HINT: are you sure cmake is installed? You might also be missing a library. Atari-py requires: zlib [installable as 'apt-get install zlib1g-dev' on Ubuntu].)

遇到这个报错是在windows安装ray==1.0.0的时候，安装ray一切正常，安装ray[rllib]报错了！

安装atari-py，

pip install atari-py -i https://mirrors.aliyun.com/pypi/simple

报错：

解决：更换atari-py版本为0.2.9

pip install atari-py==0.2.9 -i https://mirrors.aliyun.com/pypi/simple

成功！

再安装ray[rllib]成功。

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AttributeError: module 'contextlib' has no attribute 'nullcontext'

这个是由于python3.6 不支持 contxtlib。contxtlib在gym0.21.0中支持python3.7。

解决安装gym==0.20.0

pip install gym==0.20.0