django的hello world 项目

一、新建一个django项目bester：

django-admin startproject bester

二、在bester项目中建一个叫polls的应用程序：

cd bester/
python3 manage.py startapp polls

三、给polls加一个叫index的函数：

　　cat polls/views.py

from django.shortcuts import render
from django.http import HttpResponse

def index(requst):
    return HttpResponse("hello world ....")

四、polls增加路由：

　　1、在polls项目中加一个urls.py的文件、里面维护了一组url到视图的对应关系

touch polls/urls.py

　　2、polls/urls.py文件的内容如下：

from django.conf.urls import url
from .views import index

urlpatterns=[
    url(r'^$',index),
]

五、把polls/urls.py中的路由信息增加到项目的路由信息中去：

　　修改bester/urls.py 文件的内容如下：

"""bester URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/1.11/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.conf.urls import url, include
    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
"""
from django.conf.urls import url,include
from django.contrib import admin

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^polls/',include('polls.urls'))
]

六、启动http服务：

python3 manage.py runserver
Performing system checks...

System check identified no issues ( silenced).

You have  unapplied migration(s). Your project may not work properly until you apply the migrations for app(s): admin, auth, contenttypes, sessions.
Run 'python manage.py migrate' to apply them.

November ,  - ::
Django version 1.11., using settings 'bester.settings'
Starting development server at http://127.0.0.1:8000/
Quit the server with CONTROL-C.

七、从浏览器打开网页：

总结：

　　以上内容就是django官方文档中的第一个入门的例子了。

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