just do this:
python manage.py runserver 0:8000
by the above command you are actually binding it to the external IP address. so now when you access your IP address with the port number, you will be able to access it in the browser without any problem.
just type in the following in the browser address bar:
<your ip address>:8000
eg:
192.168.1.130:8000
you may have to edit the settings.py add the following in the settings.py in the last line:
ALLOWED_HOSTS = ['*']
hope this will help...