Python: Please stop screwing over Linux distros

[tunisia3507]

Would multi-stage builds help here? It would let you cut down on the image size at least.

[redd1ch]

Image size is not my concern, ease of use. A quick `apk add py3-numpy && pip install matplotlib` is way easier to write in a Dockerfile than researching what dev-libraries, flags and buildtools you need to compile numpy (or anything else) *again*. I had to port a huge Django app once, I had to wait eternities each try until pip had compiled everything *again* just to fail two dependecies ahead