Appends event to log
        Be careful it opens file every time!

def _append(self, ev_type: Enum, data: ActionLogData) -> None:
        """
        Appends event to log
        Be careful it opens file every time!
        """
        event = ActionLogEvent(None, ev_type, data, types=self._event_types)
        with open(self._file_path, mode='a+', newline='') as f:
            f.write(event.pack(delimiter=self._delimiter))
        self._items.append(event)