Cannot kill previous Python processes.

I'm using Python with Flask on Windows to build a blog, and using Script to run the routes.py to test on browser. Everything's fine except that the Ctrl+Q only kills the current running process, the previous processes still run in the background and that causes the browser can't receive the latest script after refresh.

It's quite annoying that everytime I forget to kill the process before running new one I have to open Task Manager and kill Python manually. Could you add one more shortcut to kill all processes?

Thank you.