the pytorch1.12.1+cpu is unable to be installed

[smallduan]

Hi While I am configuring my pyhon environment, I am facing problem, it shows that pytorch doesn't contain this version of package anymore, if I can install oter version instead?

[smallduan]

I also try to install the torch1.12.1 cpu by myself, but it still failed

[AndreWeiner]

Hi @smallduan, thanks for reporting the issue. I assume you are working with a fairly recent OS version, e.g., Ubuntu 24.04? Switching to a newer version of the PyTorch Python package will introduce a version conflict with the C++ frontend (libTorch). So, to run drlFoam with a newer version of PyTorch you need to:

1. edit the requirements.txt file in the drlFoam folder and set the version to the latest available version (or leave out the version specification)

   pip3 install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cpu

2. install the new packages in the virtual environment
3. remove the libtorch folder within drlFoam
4. edit the setup-env in the drlFoam folder and switch to the latest version of libTorch (2.3.1):

   if [ ! -d $DRL_TORCH ];
   then
       echo "Could not find libTorch dependencies. Downloading libTorch to ${DRL_TORCH}"
       wget https://download.pytorch.org/libtorch/cpu/libtorch-cxx11-abi-shared-with-deps-2.3.1%2Bcpu.zip && \
       unzip libtorch-cxx11-abi-shared-with-deps-2.3.1+cpu.zip
       rm libtorch-cxx11-abi-shared-with-deps-2.3.1+cpu.zip
   fi

5. run Allwmake to check if the code compiles with the latest version (not tested)

Please let me know if this works for you. Best, Andre

[smallduan]

Hi Thank you, It works for me.