请问是什么原因

android device list: [u'3f34e213']
ERROR:tornado.application:Uncaught exception POST /device (127.0.0.1)
HTTPServerRequest(protocol='http', host='127.0.0.1:10010', method='POST', uri='/device', version='HTTP/1.1', remote_ip='127.0.0.1', headers={'Origin': 'http://127.0.0.1:10010', 'Content-Length': '15', 'Accept-Language': 'zh-CN,zh;q=0.8', 'Accept-Encoding': 'gzip, deflate, br', 'Host': '127.0.0.1:10010', 'Accept': 'application/json, text/javascript, /; q=0.01', 'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36', 'Connection': 'keep-alive', 'X-Requested-With': 'XMLHttpRequest', 'Referer': 'http://127.0.0.1:10010/', 'Cookie': 'guid=96992031.3752038610054687000.1504003074348.3323; monitor_count=2', 'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'})
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\tornado\web.py", line 1509, in _execute
result = method(self.path_args, **self.path_kwargs)
File "C:\Python27\lib\site-packages\atxweb\server.py", line 343, in post
device = atx.connect(*settings)
File "C:\Python27\lib\site-packages\atx__init.py", line 77, in connect
c = cls(connect_url, **kwargs)
TypeError: init() got multiple values for keyword argument 'serialno'
ERROR:tornado.access:500 POST /device (127.0.0.1) 6.00ms