Has anyone installed flask_socketio (or other flask extensions)?
When I try the normal way, it says access denied (pip install flask_socketio).
When I use pip3 or pip3.5, it still says access denied.
When I say pip3.6, it says I already have it, but when I try to run it in my flask_app.py, it doesn't work.
I don't really know what else to try - how should I install it?