Re: [Zope] Persistence triggering

But can I also do?

self.list = self.list + [item]

Yes... this works because you're treating it immutably. Although this is likely much slower than an .append because the interpreter needs to make a copy of self.list before tacking on your item. You can also do: self.list.append(item) self._p_changed = 1 This explicitly tells the ZODB to include the object represented by self in the current transaction.