官网学习django

https://docs.djangoproject.com/en/1.11/intro/tutorial01/

根据上网站学习，第一个困难是无法显示polls success 的界面  

显示为：

Page not found (404)

Request Method:	GET
Request URL:	http://localhost:8000/polls

Using the URLconf defined in 

mysite.urls

, Django tried these URL patterns, in this order:
^admin/

The current path, 

polls

, didn't match any of these.

You're seeing this error because you have 

DEBUG = True

 in your Django settings file. Change that to 

False

, and Django will display a standard 404 page.

发现原因为mysite分为父目录和子目录，父目录里的urls.py写了，而执行的是子目录里的urls。

修改后成功出现界面：

Hello, world. You're at the polls index.