For the moment this code has been tested only on linux, and python 3.9.
You can skip this step and use the tool of your choice to create the python virtual environment with python 3.9.*
We recommend miniconda for a light and easy installation. If you already have it installed in your system, you can skip this step, otherwise follow the instructions https://docs.conda.io/projects/conda/en/latest/user-guide/install/linux.html
$ git clone THISREPO
$ cd 3DMM-TUTORIAL
$ conda create --prefix ./env/main
$ conda activate env/main
$ make install