==================hello.py=================================

import sys

from django.conf import settings
from django.http import HttpResponse
from django.conf.urls import url
from django.core.management import execute_from_command_line

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

def index(request):
    return HttpResponse('Hello World')

urlpatterns = (
    url('^$', index),
)

if __name__ == "__main__":
    execute_from_command_line(sys.argv)

========================================================

运行命令：
python hello.py runserver