[Fixed]-Django 1.10 : view function() takes exactly 2 arguments (1 given)

The article_no arg does not magically find its way into the function call via the POST submit. You need to provide it to the url tag:

{% url 'blog:edit_article' item.no %}

This assumes, of course, that you have a url pattern with an appropriate named group associated with this view/view name.

If You are talking about this function, it does recieve more than one Arg, it recieves the No you are talking about, and the request object

def edit_article(request, article_no):
...

If your view needs arguments you must give the arguments in the url templatetag, like this :

{% url ‘accounts:detail_account’ username = username %}