[Zope] Get properties from Python code

I have a python script that I'd like to get a property from a page template. What would the code look like to do that? I've tried context['page.html'].properties['redirect'], context['page.html'].properties.getProperty('redirect'), and can't find anything in the docs that indicate how to do something like that... Or, even better this is what I want to do -> When someone goes to a members only page, check if they're logged in, if so display the page, otherwise redirect them to the login form. After they login, I want to redirect them back to the page they originally wanted. I'm NOT using the CMF, so I have to do logins, auth, and all that jazz myself. -jim