Can i host flask websites on github?

Answer 1

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

Answer 2

Nope. But you can do it on heroku.com:
https://devcenter.heroku.com/categories/JUMP_LINK__&&__python__&&__JUMP_LINK-support