“ModuleNotFoundError：No module named apex” 解决

1、参考https://blog.youkuaiyun.com/qq_53354720/article/details/142616576，直接去https://www.github.com/nvidia/apex下载apex-master的zip，解压缩放到项目目录里面。

2、参考https://blog.youkuaiyun.com/szn1316159505/article/details/137655660和https://blog.youkuaiyun.com/starvapour/article/details/122275439这两篇博文，修改apex-master/apex/amp/utils.py
3、

cd apex-master

pip install -v --disable-pip-version-check --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext" --no-build-isolation ./