gistfile1.py

    def paginate(self, items, items_per_page=20):
        """https://bitbucket.org/bbangert/webhelpers/src/acfb17881c1c/webhelpers/paginate.py"""

        current_page = self.request.GET.get('page') or 1

        def page_url(page):
            params = self.request.params.copy()
            params['page'] = page
            return self.request.current_route_url(_query=params)

        return Page(collection=items, page=current_page, items_per_page=items_per_page, url=page_url)