Web2Py is eminently Python 3 compatible these days. I have used it for largish projects, and consider it very much not awful at all, but I am aware of opinions

Web2Py is eminently Python 3 compatible these days. I have used it for largish projects, and consider it very much not awful at all, but I am aware of opinions on the subject often being polarised (Flask creator Armin Ronacher for one has spent a lot of words and energy badmouthing Web2Py - a behaviour I personally find somewhat unbecoming). For those not caught up in dogma too much: Try it. Got a lot going for it, and the docs are superb.