Path is not match any of these - django

Question

I always get this error "The empty path didn't match any of these." When I try to access the page through this url:
url('^about/$',views.AboutView.as_view(),name = 'about')
and when I remove "^about/$" part, then it works:
url('',views.AboutView.as_view(),name = 'about')
How could I resolve it?
This is link for call:
<li><a class="navbar-brand" href="{% url 'about'%}">About</a></li>
this is view.py
class AboutView(TemplateView):
template_name = 'about.html'
and, this urlpatterns
urlpatterns = [
url('^about/$',views.AboutView.as_view(),name = 'about')
]

Answer 1

from django.conf.urls import url
from blog import views
urlpatterns = [ url('about',views.AboutView.as_view(),name='about') ]
instead of this
from django.urls import path
from blog import views
urlpatterns = [
path('about/', views.AboutView.as_view(),name='about'),
use this pattern same as your main url

Answer 2

path('about/', views.AboutView, name='about'),

Answer 3

It's not good to follow 2 ways of creating urls, Since django==2.0 they have introduced very nice and easy way to declare urls.
In the old way...
from django.conf.urls import url
urlpatterns = [
url(r'^about/$', AboutView.as_view(), name="about")
]
But In the new way it's lot more cleaner...
from django.urls import path
urlpatterns = [
path('about/', view.AboutView.as_view())
]
But if you want to stick with the regular expressions, Use re_path() instead of path().
urlpatterns = [
re_path(r'about/$', view.AboutView.as_view())
]
In my it's better stay with one pattern, old or new but not both. It makes your code look more cleaner.