self.context.value = True

        for i in self.context.values():
            i.name = u'hello world'

        for i in self.context.values():
            i.name = u'hello world'
        transaction.commit()

from zope.event import notify
...
for i in self.context.values():
    i.name = u'hello world'
    notify(ObjectModifiedEvent(i))

from zope.event import notify
from zope.lifecycleevent import ObjectModifiedEvent

        for i in self.context.values():
            i.name = u'hello world'
            notify(ObjectModifiedEvent(i))

self.context.value = True

  self.context.value.append(some_object)

self.context._p_changed = 1

                    if self.context.__parent__ in prop.props.get(lastvalue, []):
                        prop.props[lastvalue].remove(self.context.__parent__)
                    if prop.props.has_key(self.context.value):
                        prop.props[self.context.value].append(self.context.__parent__)
                    else:
                        prop.props[self.context.value] = [self.context.__parent__]
                    prop._p_changed = 1
                    ObjectModifiedEvent(prop)

from copy import copy
_props = copy(prop.props)
.... # Делаем все необходимое с _props
prop.props = _props