Make sure you are having virtualenv (virtualenv or virtualenvwrapper)
Create a virtualenv and activate then run in terminal
pip install -r requirements.txt
./manage.py migrate
./manage.py loaddata sites
./manage.py runserver
Channels change django in multiprocess model. We don't run everything in a wsgi server. Runserver will work as worker server where django runs actual logic and asgi server will work as interface server that's capapble of serving websockets.
Install asgi server
pip install asgi_redis
Run asgi-server and django runserver
asgi-server
python manage.py runserver
Browse on 127.0.0.1:8000