code: def _log_an_event(self, event, evresult='No Result', note='No Note'):
          
          objs = object_session(self)
          evnt = SymbolLogEvent(event, evresult, note, sym=self.name)
          objs.add(evnt)
          objs.commit()
docs: log an event
          
          Parameters
          ----------
          event : string
          evresult : string
          note : string