def add_resources(self, resources):
new_resources = self._build_resource_dictionary(resources)<EOL>for key in new_resources:<EOL><INDENT>self._resources[key] = new_resources[key]<EOL><DEDENT>self._dirty_attributes.add(u'<STR_LIT>')<EOL>
Adds new resources to the event.

*resources* can be a list of email addresses or :class:`ExchangeEventAttendee` objects.