I've had success restricting myself to Python packages provided by the OS (Debian) in production. The only down-side is there is only one Python (well, 3.* or

I've had success restricting myself to Python packages provided by the OS (Debian) in production. The only down-side is there is only one Python (well, 3.* or 2.7) against which to test, so I drop back to a pip install of the same packages for CI, and that's where 90% of my Python pain comes from, every maintainer of every Python infrastructure package feels entitled to shout "DEPRECATION, do THIS, do THAT, use THIS" at me. It's ill-mannered and unpleasant.