1.http://127.0.0.1:8000/index/?username=zhangsan
如何获取url上username这个参数的值?
其实很简单

#coding:utf-8
from django.shortcuts import render,render_to_response

# Create your views here.

from django.http import HttpResponse
def index(request):
    user = {'user_id':1,'username':'Apollo','age':28}
    getUserName = request.GET.get('username')
    print(getUserName)
    return render_to_response("index.html",user)

request.GET.get()就是获取url参数。
上面print getUserName打印结果为:Apollo
还可以这样写:

request.GET['username']

来学一下python的字典这个数据类型吧

user = {'user_id':1,'username':'Apollo','age':28}

这样就是定义字典

获取字典中某个key的值有2种方式:

print user.get('username')
print user['username']

他们到底有什么区别呢?
我来常识打印一个没有的key,比如

print user.get('kk')

打印结果为:None

print user['kk']