百度天工云mqtt测试中的一个BUG

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一、环境

win7 python2.7.13

二、报错

Traceback (most recent call last):
File "E:/project/test/mqtt/mqtt_test.py", line 35, in <module>
client.connect(endpoint, port, 60) #连接服务 keepalive=60
File "D:\python2713\install\lib\site-packages\paho\mqtt\client.py", line 768, in connect
return self.reconnect()
File "D:\python2713\install\lib\site-packages\paho\mqtt\client.py", line 940, in reconnect
return self._send_connect(self._keepalive, self._clean_session)
File "D:\python2713\install\lib\site-packages\paho\mqtt\client.py", line 2127, in _send_connect
"!H" + str(len(protocol)) + "s"+ "BBH", len(protocol), protocol, proto_ver, connect_flags, keepalive)
struct.error: cannot convert argument to integer

三、解决

源代码：

"!H" + str(len(protocol)) + "s"+ "BBH", len(protocol), protocol, proto_ver, connect_flags, keepalive)

改为：

"!H" + str(len(protocol)) + "s"+ "BBH", len(protocol), protocol, 4, connect_flags, keepalive) # change by ruoyun at 171030

原因：

通过打印变量发现

proto_ver  并没有不是以为变量形式传入，导致本来应该传入4，结果传入一个字符串'MQTTv311'

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