Apex can't be installed.

[StamatisKourkoutas]

The apex dependency requires specific cuda versions to be installed (still haven't managed to install it) and makes the whole F3Net code extremely hard to install and experiment with.

pip install apex fails and installation also fails when apex is installed via the github folder with either:

python setup.py install --cuda_ext --cpp_ext
or
git clone https://github.com/NVIDIA/apex
cd apex
pip install -v --no-cache-dir --global-option="--cpp_ext" --global-option="--cuda_ext" ./