TypeError: '<' not supported between instances of 'int' and 'tuple'

[rbrunhuber]

I'm using the current version of master (commit a345dcd) and I'm seeing the following exception.

Environment:
•Kafka 0.10.0.2.6
•Kerberos 5 version 1.12.2 (MS AD server)
•Python 3.6.1 |Anaconda 4.4.0 (64-bit)
•kafka-python (1.3.6.dev0)
•gssapi (1.2.2)

Traceback (most recent call last):
  File "/home/myname/workspace/python/kafkatest/kafkatest.py", line 20, in <module>
    ,auto_offset_reset='earliest'
  File "/opt/continuum/anaconda3/lib/python3.6/site-packages/kafka/consumer/group.py", line 327, in __init__
    self._client = KafkaClient(metrics=self._metrics, **self.config)
  File "/opt/continuum/anaconda3/lib/python3.6/site-packages/kafka/client_async.py", line 225, in __init__
    self._bootstrap(collect_hosts(self.config['bootstrap_servers']))
  File "/opt/continuum/anaconda3/lib/python3.6/site-packages/kafka/client_async.py", line 259, in _bootstrap
    bootstrap.connect()
  File "/opt/continuum/anaconda3/lib/python3.6/site-packages/kafka/conn.py", line 384, in connect
    if self._try_authenticate():
  File "/opt/continuum/anaconda3/lib/python3.6/site-packages/kafka/conn.py", line 468, in _try_authenticate
    raise ex  # pylint: disable-msg=raising-bad-type
  File "/opt/continuum/anaconda3/lib/python3.6/site-packages/kafka/conn.py", line 580, in _try_authenticate_gssapi
    received_token = self._recv_bytes_blocking(token_size)
  File "/opt/continuum/anaconda3/lib/python3.6/site-packages/kafka/conn.py", line 510, in _recv_bytes_blocking
    while len(data) < n:
TypeError: '<' not supported between instances of 'int' and 'tuple'

According to the other usages of "unpack" I "naively" fixed this problem by changing the function "_try_authenticate_gssapi" in "conn.py" according to the following diff:

575c575
<                     token_size = struct.unpack('>i', header)
---
>                     token_size = struct.unpack('>i', header)[0]

I don't know if this only fails for me or my version of python but without the fix I could not continue to test this library.

[dpkp]

Thanks for the bug report. Fix in PR #1280