Best way of linking to a page in Django

Django has updated urlpatterns to take 'path' instead of using url so it's become much more efficient. You don't have to use regex anymore

from django.urls import path
from . import views

urlpatterns=[
    path('', views.index , name='index'),
    path('blog/', views.blog , name='blog'),]

Then in templates, you can use template tagging

<a href="{% url 'index' %}">Index</a>
<a href="{% url 'blog' %}">Blog</a>

If you have multiple apps, you can tag it as follows. For example, if this is under 'post' app:

In post app urls.py:

from django.urls import path
from . import views

app_name = 'post'
urlpatterns=[
    path('', views.index , name='index'),
    path('blog/', views.blog , name='blog'),]

in the project urls.py:

from django.urls import path, include

urlpatterns=[
path('post/', include('post.urls'),]

In templates, you do as following:

<a href="{% url 'post:index' %}">Index</a>
<a href="{% url 'post:blog' %}">Blog</a>

So next you would extend your urls.py to look something like this:

url(r'^$', 'index', name='index'),
url(r'^blog$', 'blog', name='blog'),

Then in your html you can use either one:

<a href="{% url 'index' %}">Home</a>
<a href="{% url 'blog' %}">Blog</a>

You can of course use the template tage {% url 'index' %} as many times as you need in any template.