def get(self, *q_objs, **query):
        """Retrieve the the matching object raising
        :class:`~mongoengine.queryset.MultipleObjectsReturned` or
        `DocumentName.MultipleObjectsReturned` exception if multiple results
        and :class:`~mongoengine.queryset.DoesNotExist` or
        `DocumentName.DoesNotExist` if no results are found.

        .. versionadded:: 0.3
        """
        queryset = self.clone()
        queryset = queryset.order_by().limit(2)
        queryset = queryset.filter(*q_objs, **query)

        try:
            result = queryset.next()
        except StopIteration:
            msg = ("%s matching query does not exist."
                   % queryset._document._class_name)
            raise queryset._document.DoesNotExist(msg)
        try:
            queryset.next()
        except StopIteration:
            return result

        queryset.rewind()
        message = u'%d items returned, instead of 1' % queryset.count()
        raise queryset._document.MultipleObjectsReturned(message)
dataset/ETHPy150Open MongoEngine/mongoengine/mongoengine/queryset/base.py/BaseQuerySet.get/original