Many thanks to Aladdin Persson (https://www.youtube.com/c/AladdinPersson) for his videos.
pip install pipenv
python -m pipenv install Pipfile
Extract anime or any other paired images dataset into the folder "data". https://www.kaggle.com/datasets/ktaebum/anime-sketch-colorization-pair
python -m pipenv run coverage run
run train.py script.