django?3.1.5?這樣寫
path('detail/<int:article_id>/',?blog.views.get_detail),

參考https://docs.djangoproject.com/

應該是版本不一樣所以路由配置不一樣把，你改改這個試試：

就是把老師講的那個<int:article_id>改成

(?P<article_id>[0-9]+)

具體和上圖那樣子。

然后在views.py里面稍微改一下

只有第41行的代碼不一樣，注意改一下，然后應該就可以了

我也是這個錯誤

url(r'^detail/<int:article_id>$',views.get_detail_page)

def?get_detail_page(request,article_id):
????all_article?=?Article.objects.all()
????curr_article?=?None
????for?article?in?all_article:
????????if?article.article_id?==?article_id:
????????????curr_article?=?article
????????????break
????#curr_article?=?Article.objects.all()[1]
????session_list?=?curr_article.content.split('\n')
????return?render(request,'cs/detail.html',
??????????????????{
??????????????????????'curr_article':?curr_article,
??????????????????????'session_list':session_list
??????????????????})

Page not found?(404)

Using the URLconf defined in?project.urls, Django tried these URL patterns, in this order:

1. ^play/ ^hello/$

2. ^play/ ^content/$

3. ^play/ ^index/$

4. ^play/ ^detail/<int:article_id>$

5. ^admin/

The current path,?play/detail/1, didn't match any of these.