When I set Python3.4, it will broke the kafka

[hongwei1]

Exception: [Error 17] InvalidTopicError: b'Response'
This error as following, and there will not log on the console

/Users/zhanghongwei/python34/bin/python /Users/zhanghongwei/Documents/GitHub-Tower/OBP-Kafka-Python/server.py
Console output is saving to: /Users/zhanghongwei/Desktop/Apps/OBP-Kakfa-Python.log
Connecting to localhost:9092...
Connected to localhost:9092.
producer: OK
consumer: OK
Connected. Waiting for messages...
Request:0:0: key=b'b23fac91-1365-40c4-be66-ba3cda9c5642' value=b'{"username":"","messageFormat":"Mar2017","userId":"","bankId":"obp-bank-x-gh","action":"obp.get.Bank"}'
Mar2017
getBank
{'messageFormat': 'Mar2017', 'username': '', 'userId': '', 'bankId': 'obp-bank-x-gh'}
{"count": "", "data": [{"logo": "https://static.openbankproject.com/images/sandbox/bank_x.png", "errorCode": "OBPS-001: xxx.", "name": "The Bank of X", "bankId": "obp-bank-x-gh", "url": "https://www.example.com"}], "pager": "", "target": "bank", "state": ""}

Exception: [Error 17] InvalidTopicError: b'Response'
Info: Kafka disconnected. Reconnecting...
producer: OK