Using WSDL service from Python, it is my client code or the server?

I'm trying to write a Python client for a a WSDL service. I'm using the Suds library to handle the SOAP messages.

When I try to call the service, I get a Suds exception: <rval /> not mapped to message part. If I set the retxml Suds option I get XML which looks OK to me.

Is the problem with the client code? Am I missing some flag which will allow Suds to correctly parse the XML? Alternatively, the problem could be with the server. Is the XML not structured correctly?

My code is a follows (method names changed):

c = Client(url)  
p = c.factory.create('MyParam')  
p.value = 100  
c.service.run(p)  

This results in a Suds exception:

File "/home/.../test.py", line 38, in test  
res = self.client.service.run(p)
File "/usr/local/lib/python2.6/dist-packages/suds-0.3.9-py2.6.egg/suds/client.py", line 539, in __call__
return client.invoke(args, kwargs)
File "/usr/local/lib/python2.6/dist-packages/suds-0.3.9-py2.6.egg/suds/client.py", line 598, in invoke
result = self.send(msg)
File "/usr/local/lib/python2.6/dist-packages/suds-0.3.9-py2.6.egg/suds/client.py", line 627, in send  
result = self.succeeded(binding, reply.message)  
File "/usr/local/lib/python2.6/dist-packages/suds-0.3.9-py2.6.egg/suds/client.py", line   659, in succeeded  
r, p = binding.get_reply(self.method, reply)  
File "/usr/local/lib/python2.6/dist-packages/suds-0.3.9-py2.6.egg/suds/bindings/binding.py", line 151, in get_reply  
result = self.replycomposite(rtypes, nodes)  
File "/usr/local/lib/python2.6/dist-packages/suds-0.3.9-  py2.6.egg/suds/bindings/binding.py", line 204, in replycomposite  
raise Exception('<%s/> not mapped to message part' % tag)  
Exception: <rval/> not mapped to message part  

The returned XML (modified to remove customer identifiers)

<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
  <S:Body>
    <ns2:getResponse xmlns:ns2="http://api.xxx.xxx.com/api/">
      <rval xmlns="http://xxx.xxx.xxx.com/api/">
        <ns2:totalNumEntries>
          2
        </ns2:totalNumEn开发者_如何学编程tries>
        <ns2:entries>
          <ns2:id>
            1
          </ns2:id>
        </ns2:entries>
        <ns2:entries>
          <ns2:id>
            2
          </ns2:id>
        </ns2:entries>
      </rval>
    </ns2:getResponse>
  </S:Body>
</S:Envelope>

Possible dup of What does suds mean by "<faultcode/> not mapped to message part"?

Here is my answer from that question:

I had a similar issue where the call was successful, and Suds crashed on parsing the response from the client. The workaround I used was to use the Suds option to return raw XML and then use BeautifulSoup to parse the response.

Example:

client = Client(url)
client.set_options(retxml=True)
soapresp_raw_xml = client.service.submit_func(data)
soup = BeautifulStoneSoup(soapresp_raw_xml)
value_i_want = soup.find('ns:NewSRId')

This exception actually means that the answer from SOAP-service contains tag <rval>, which doesn't exist in the WSDL-scheme of the service.

Keep in mind that the Suds library caches the WSDL-scheme, that is why the problem may occur if the WSDL-scheme was changed recently. Then the answers match the new scheme, but are verified by the suds-client with the old one. In this case rm /tmp/suds/* will help you.