clamp_pagination() for django-pagination app

gistfile1.py

@register.simple_tag(takes_context=True)
def clamp_pagination(context, key):
     """
     Force number of pages to be never be more than PAGINATION_FIXED_NB_PAGES
     """
     paginator = context.get('paginator')
     page_obj = context.get('page_obj')
     if paginator and page_obj:
         max_num_pages = getattr(settings, 'PAGINATION_FIXED_NB_PAGES', 10)
 
         if hasattr(paginator, '_num_pages') and hasattr(paginator, '_count'):
            # If it's a "real" paginator with count, num pages etc, clamp it to our max value
             paginator._num_pages = min(paginator.num_pages, max_num_pages)
             max_count = paginator.num_pages * paginator.per_page
             paginator._count = min(paginator.count, max_count)
 
         if hasattr(page_obj, 'cached_has_next') and page_obj.number == max_num_pages:
             # If the paginator has a cache for the next page, force it to False it we
             # are on the last page
             page_obj.cached_has_next = False
 
         if page_obj.number > max_num_pages:
             # Raising Http404 is sadly useless : it doesn't work inside templatetags,
             # it's too late. Instead, we emulate what {% autopaginate %} does
             del context['paginator']
             del context['page_obj']
             context[key] = []
             context['invalid_page'] = True
     return u''