Pycharm in particular likes fetching Django console spontaneously (while I’m copy-and-pasting things in project tree). After runserver:

Performing system checks...

System check identified no issues (0 silenced).
July 09, 2019 - 15:45:49
Django version 2.0, using settings 'project.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.
Error: That port is already in use.

For some reason port 8000 is already in use? Just use this:

sudo kill 'sudo lsof -t -i:8000'

Just annoying.