[Zope] Transaction rollback

I need to return an error page with instructions after verifying a request but I need to do a rollback. How can I call a full rollback, like when using raise(), inside a python script and redirect to an error page. I found many posts about get_transaction().rollback() but it is deprecated in Zope 2.9. What is the modern way of doing this? Thanks in advance. -- Luiz Fernando B. Ribeiro Engenho Soluções para a Internet