Can i host flask websites on github?
You can't host a python application onGithub pages, it's designed for simple static file hosting. You could use something like Flask-Frozen to turn your Flask application into staticpages, but then you obviously have some big tradeoffs depending on yoursite's functionality
Nope. But you can do it on heroku.com: https://devcenter.heroku.com/categories/JUMP_LINK__&&__python__&&__JUMP_LINK-support