python发送的protobuf格式不对

python发送的数据格式不对，本来期望应该是发送

entity.subReqID = 1
entity.userName = "H2901"
entity.productName = "qao"
entity.address = "guangzhou"
这样的字符串。但是发送的却是
b'\x08\x01\x12\x05H2901\x1a\x03qao"\tguangzhou'
导致了Android端解码失败。
python发送代码：
entity = SubscribeRespProto_pb2.SubscribeRespProto()
entity.subReqID = 1
entity.userName = "H2901"
entity.productName = "qao"
entity.address = "guangzhou"
content = entity.SerializeToString()
print(content)
proto.transport.write(content)
print ('send to', self.transport.client)

protobuf本来就会编码，你接收的时候，看解码是否正确。或者用自带的解码工具看看是否正确