How is a variable designated in a Django regular expression?

Question

Django

None of the answers on the internet worked.
I'm new to Django
Django 1.10
url(r'^article(variable here)$', article_get)
The variable will be passed to the view function as the second variable.
Blog project, so I want to create the ability to view one article.

Answer 1

https://docs.djangoproject.com/en/1.10/intro/tutor...