Unfortunately in many (most?) cases I've seen the prescribed deployment practice for Python software is to use virtualenv (or some variant of it). Python dependencies are to be handled exclusively via pip (requirements.txt, install_requires in setup.py, etc.) and using distro-packaged Python modules is frowned upon because they are considered to be outdated.
I'm not saying that's the best practice. Personally I like to use distro-packaged stuff as much as possible because it's less volatile and tends to go through some more review than things on PyPI. But the virtualenv/pip exclusive method does seem to prevail in the field in my experience, so the advice to just use Alpine packages isn't useful in many cases.
I'm not saying that's the best practice. Personally I like to use distro-packaged stuff as much as possible because it's less volatile and tends to go through some more review than things on PyPI. But the virtualenv/pip exclusive method does seem to prevail in the field in my experience, so the advice to just use Alpine packages isn't useful in many cases.