django 视图开发与url配置

可识别的视图需满足一下两个条件：

1.第一个参数的类型：HttpRequest
2.返回HttpResponse实例

在新建app的views当中写下以下内容

from django.shortcuts import render

# Create your views here.
from django.http import HttpResponse

def hello(request):
    return HttpResponse("Hello world")

修改urls

from django.conf.urls import patterns, include, url
from django.contrib import admin

from myLesson.views import *

urlpatterns = patterns('',
    # Examples:
    # url(r'^$', 'myTest.views.home', name='home'),
    # url(r'^blog/', include('blog.urls')),
    (r'^hello/$',hello),
    url(r'^admin/', include(admin.site.urls)),
)

然后打开

localhost:8000/hello

回顾

回顾一下整个流程
1.首先访问settings，当中的ROOT_URLCONF = 'myTest.urls'
2.在urls当中找到 (r'^hello/$',hello),
3.在myLesson当中的views当中找到hello

扩展

修改urls，添加

    (r'^hello/(\d+)/$',hello1),

在views当中添加一个新的函数

def hello1(request,num):
    try:
        num=int(num)
    except Exception as e:
        raise Http404()

然后在localhost:8000/hello/3