Say you need to migrate a bunch of content types and you need to switch from an old type to a new type, the code below will do it quick and easily:
from Products.contentmigration.inplace import InplaceCMFItemMigrator for each cabotpage in folder.objectValues(): migrator = InplaceCMFItemMigrator(cabotpage) migrator.dst_portal_type = 'CabotProduct' # change the content type migrator.migrate()
More info:
http://svn.plone.org/svn/collective/contentmigration/trunk/src/Products/contentmigration/
http://plone.org/documentation/tutorial/richdocument/migrations