docs: def recent_articles(limit=10, exclude=None):
      """Returns list of latest article"""
      queryset = Article.objects.filter(published=True).order_by('-modified')
      if exclude:
          if hasattr(exclude, '__iter__'):
              queryset = queryset.exclude(pk__in=exclude)
          else:
              queryset = queryset.exclude(pk=exclude)
      return queryset