A django view in a single file, adapted from https://raw.githubusercontent.com/halfnibble/django-light/master/hello.py

hello.py

from django.conf import settings
from django.http import HttpResponse
from django.conf.urls import url

settings.configure(
    DEBUG = True,
    SECRET_KEY = 'yourrandomsecretkey',
    ROOT_URLCONF = __name__,
    MIDDLEWARE_CLASSES = (),
)

urlpatterns = (
    url(r'^$', lambda request: HttpResponse('Hello!')),
)

if __name__ == '__main__':
    from django.core.management import execute_from_command_line
    import sys
    execute_from_command_line(sys.argv)