Python 使用PySimpleSOAP调用函数

我正在尝试使用一个web服务调用一个函数，该服务在使用SoapUI时似乎可以正常工作，但在使用PySimpleSAP时却不行。WSDL具有以下功能：

Name: getAvailableDates
Input {'getAvailableDates': {u'criteria': {u'id': <type 'str'>, u'appointmentDurationMin': <type 'int'>}, u'numberOfSlots': <type 'int'>}}

但它总是返回一个我不理解的神秘错误：

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/env/lib/python2.7/site-packages/pysimplesoap/client.py", line 181, in <lambda>
    return lambda *args, **kwargs: self.wsdl_call(attr, *args, **kwargs)
  File "/env/lib/python2.7/site-packages/pysimplesoap/client.py", line 346, in wsdl_call
    return self.wsdl_call_with_args(method, args, kwargs)
  File "/env/lib/python2.7/site-packages/pysimplesoap/client.py", line 370, in wsdl_call_with_args
    response = self.call(method, *params)
  File "/env/lib/python2.7/site-packages/pysimplesoap/client.py", line 269, in call
    fault = operation['faults'][detailXml.children()[0].get_name()]
KeyError: u'ns2:TTServiceException'

回溯（最近一次呼叫最后一次）：
文件“”，第1行，在
文件“/env/lib/python2.7/site packages/pysimplesoap/client.py”，第181行，在
返回lambda*args，**kwargs:self.wsdl_调用（attr，*args，**kwargs）
wsdl_调用中的文件“/env/lib/python2.7/site packages/pysimplesoap/client.py”，第346行
使用参数返回self.wsdl\u调用（方法、参数、kwargs）
文件“/env/lib/python2.7/site packages/pysimplesoap/client.py”，第370行，在wsdl_call_中，带有_参数
response=self.call（方法，*params）
调用中的文件“/env/lib/python2.7/site packages/pysimplesoap/client.py”，第269行
fault=operation['faults'][detailXml.children（）[0]。get_name（）]
KeyError:u'ns2:TTServiceException'

想想我可能做错了什么？谢谢你的帮助

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/env/lib/python2.7/site-packages/pysimplesoap/client.py", line 181, in <lambda>
    return lambda *args, **kwargs: self.wsdl_call(attr, *args, **kwargs)
  File "/env/lib/python2.7/site-packages/pysimplesoap/client.py", line 346, in wsdl_call
    return self.wsdl_call_with_args(method, args, kwargs)
  File "/env/lib/python2.7/site-packages/pysimplesoap/client.py", line 370, in wsdl_call_with_args
    response = self.call(method, *params)
  File "/env/lib/python2.7/site-packages/pysimplesoap/client.py", line 269, in call
    fault = operation['faults'][detailXml.children()[0].get_name()]
KeyError: u'ns2:TTServiceException'