• • 我完全按照django的例子来做。但是它不起作用。网页只是给我看火箭。**

我的项目名称：腹板
应用程序名称：main

www.example.comweb.settings.py

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'main',
]

web.urls.py

from django.contrib import admin
from django.urls import path, include

urlpatterns = [
    path('main/', include('main.urls')),
    path('admin/', admin.site.urls),
]

main.urls.py

from django.urls import path
from . import views

urlpatterns = [
    path('', views.index, name='index'),
]

main.views.py

from django.http import HttpResponse

def index(request):
    return HttpResponse("Hello, world. You're at the polls index.")

我希望网页显示"你好，世界。你在民意调查指数。"给我。