我也遇到同样的问题，python版本是3.6.6，django版本是1.11.16，运行程序后在浏览器中输入http://127.0.0.1:8000报错Page not found，如下：
Page not found (404)
Request Method: GET
Request URL: http://127.0.0.1:8000/
Using the URLconf defined in DjProDemo.urls, Django tried these URL patterns, in this order:
^polls
^my/set/
The empty path 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.
我也遇到同样的问题，python版本是3.6.6，django版本是1.11.16，运行程序后在浏览器中输入http://127.0.0.1:8000报错Page not found，如下： Page not found (404) Request Method: GET Request URL: http://127.0.0.1:8000/ Using the URLconf defined in DjProDemo.urls, Django tried these URL patterns, in this order: ^polls ^my/set/ The empty path 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.