My homework for styleru_py for 4 week
Check this here https://vk-check-friends.herokuapp.com/
If you want to use this code - don't forget to add Config Variables in it.
CLIENT_ID and CLIENT_SECRET you could get if you create your own app (here guide about this)
SECRET_KEY you must devise by yourself. Just put there some random string.
Also you need guide how to install my site on heroku.