def preserialize(self, content_type, default_serializers=None):

        mtype, serializer = self.get_serializer(content_type,
                                                default_serializers)
        self.media_type = mtype
        self.serializer = serializer()
Return a random member of set ``key``
dataset/ETHPy150Open openstack/rack/rack/api/wsgi.py/ResponseObject.preserialize--crossover with--dataset/ETHPy150Open gmr/mredis/mredis/client.py/MRedis.srandmember