def cancel(self):
if not self.id:<EOL><INDENT>raise TypeError(u"<STR_LIT>")<EOL><DEDENT>self.refresh_change_key()<EOL>self.service.send(soap_request.delete_event(self))<EOL>return None<EOL>
Cancels an event in Exchange.  ::

    event = service.calendar().get_event(id='KEY HERE')
    event.cancel()

This will send notifications to anyone who has not declined the meeting.