Flask: you can, but you really shouldn't, at least not for anything you plan to deploy.
http://flask.pocoo.org/docs/python3/#python3-support
http://lucumr.pocoo.org/2014/1/5/unicode-in-2-and-3/
Which kind of sums up the whole Python 3 situation.
http://flask.pocoo.org/docs/python3/#python3-support
http://lucumr.pocoo.org/2014/1/5/unicode-in-2-and-3/
Which kind of sums up the whole Python 3 situation.
The Python 3 support page is full of "this should work in theory, it's very under-tested, almost nobody is using it, don't blame us if you try it anyway and get rooted."
They did everything to warn you short of installing giant neon signs saying "radioactive, don't use in production."