Access named URL parameter in Template or Middleware

If you need this data in the template, just override your view's get_context_data method:

class MyView(View):
    def get_context_data(self, **kwargs):
        context = super(MyView, self).get_context_data(**kwargs)
        context['user_id'] = self.kwargs.get('user_id')
        return context

For class based views, the view is already available in the context, so you dont need to do anything on the view side. In the template, just do the following:

{{ view.kwargs.user_id }}

See this answer