Django创建应用

创建应用：以helloworld目录为例

1.进入manage.py的同级目录

2.键入命令python manage.py  startapp  blog     //blog为app的名字，随意取

3.添加应用名到helloworld的settings.py的INSTALLED_APPS中

4.在blog中的views.py中编写python代码

from django.shortcuts import render

# Create your views here.

from django.http import HttpResponse

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

5.配置url，编辑HelloWorld的urls.py文件

url函数中，第一个参数未url本身，第二个为响应函数，第三个为url名称

"""helloworld URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/2.0/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from django.conf.urls import url
from django.contrib import admin
from django.urls import path

import  blog.views as bv

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

5.启动server,  python manage.py runserver

通过http://127.0.0.1:8000/index/访问