Question

runserver命令发生以下错误：在模板C：\ Users \ V \ Downloads \ DJANGO \ blog_project \ mysite \ blog \ templates \ blog \ base.html中，第26行出现错误

Line 26 in base.html is:
   <li><a href="{% url 'about' %}">About</a></li>

In App's URL file:
    url(r'^about', views.AboutView.as_view(), name='about')
    path('about',views.AboutView.as_view(), name='about'),
Tried both with and without $ sign.

And in views.py file 
    class AboutView(TemplateView):
        template_name = 'about.html'

以下是应用程序，因为我们作为项目文件的网址应用程式网址档案：从django.urls导入路径从django.conf.urls导入URL 来自。导入视图

urlpatterns = [
    url(r'^$', views.PostListView.as_view(), name='post_list'),
    url(r'^about', views.AboutView.as_view(), name='about'),
    #path('about/',views.AboutView.as_view(), name='about'),
    url(r'^post/(?P<pk>\d+)$', views.PostDetailView.as_view(), name='post_detail'),
    url(r'^post/new/$', views.CreatePostView.as_view(), name='post_new'),
    url(r'^post/(?P<pk>\d+)/edit/$', views.PostUpdateView.as_view(), name='post_edit'),
    url(r'^post/(?P<pk>\d+)/remove/$', views.PostDeleteView.as_view(), name='post_remove'),
    url(r'^drafts/$', views.DraftListView.as_view(), name='post_draft_list'),
    url(r'^post/(?P<pk>\d+)/comment/$', views.add_comment_to_post, name='add_comment_to_post'),
    url(r'^comment/(?P<pk>\d+)/approve/$', views.comment_approve, name='comment_approve'),
    url(r'^comment/(?P<pk>\d+)/delete/$', views.comment_remove, name='comment_remove'),
    url(r'^post/(?P<pk>\d+)/publish/$', views.post_publish, name='post_publish'),

]

project URL (mysite)

from django.contrib import admin
# from django.urls import path, include
from django.conf.urls import url, include
from django.contrib.auth import views

urlpatterns = [
    url(r'$', include('blog.urls')),
    url(r'^admin/', admin.site.urls),
    url(r'^accounts/login/', views.LoginView.as_view(template_name='login.html'), name='login'),
    url(r'^accounts/logout/', views.LogoutView.as_view(), name='logout', kwargs={'next_page': '/'}),

]

Answer 1

请遵循以下所示的模式：对于旧版本的django，请使用第一个。

df.train.age.apply(lambda x:0 if x>=0 and x<500 else 0)

“反向查找'about'，未找到任何参数。尝试了1个模式：['$ about $']请求方法：”

1 个答案: