Running setup.py develop for detectron2 ERROR: pip's dependency resolver does not currently take into account all the packages that are installed. This behaviour is the source of the following dependency conflicts. slowfast 1.0 requires PIL, which is not installed.

这个错误提示是因为你安装了 detectron2，但是它需要依赖 PIL 库，而你的环境中没有安装 PIL 库导致的。你可以通过运行以下命令来安装 PIL 库：

pip install Pillow

安装完成后，再重新运行 detectron2 的安装命令即可。如果还有其他依赖问题，可以根据错误提示逐个解决。