Now grasp the back-end knowledge python and Django, Flask frame, front will be HTML, Js, JQ, backend Restful API interface could write style, no matter before and after the end of separation and separation can write their own a web page, but I can't thinking about mobile App development, only know the backend interface, front-end to call interface, want to make a, don't know what the front-end they need knowledge, HTML, too? A bunch of HTML, CSS, js files directly packaging? Bosses to talk about ideas,