Python Virtual Environment Build Instructions

prun python-3.8.9-1 virtualenv venv0
. venv0/bin/activate
pip install pip==21.1.0
pip install pip-tools==6.0.1       # pip-compile, pip-sync
pip-sync requirements/dev.txt      # let virtual environment follow requirements
# apply patches....
( cd venv0 && for pf in ../patches/*; do echo $pf && patch -N --dry-run -p1 < $pf; done )
( cd venv0 && for pf in ../patches/*; do patch -N -p1 < $pf; done )