Web Service client in Python using ZSI - "Classless struct didn't get dictionary"
Question: I am trying to write a sample client in Python using ZSI for a simple Web
Service. The Web Service WSDL is following:

    
    
    <?xml version="1.0" encoding="UTF-8" standalone="no"?>
    <wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tns="http://www.example.org/test/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" name="test" targetNamespace="http://www.example.org/test/">
      <wsdl:message name="NewOperationRequest">
        <wsdl:part name="NewOperationRequest" type="xsd:string"/>
      </wsdl:message>
      <wsdl:message name="NewOperationResponse">
        <wsdl:part name="NewOperationResponse" type="xsd:string"/>
      </wsdl:message>
      <wsdl:portType name="test">
        <wsdl:operation name="NewOperation">
          <wsdl:input message="tns:NewOperationRequest"/>
          <wsdl:output message="tns:NewOperationResponse"/>
        </wsdl:operation>
      </wsdl:portType>
      <wsdl:binding name="testSOAP" type="tns:test">
        <soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
        <wsdl:operation name="NewOperation">
          <soap:operation soapAction="http://www.example.org/test/NewOperation"/>
          <wsdl:input>
            <soap:body namespace="http://www.example.org/test/" use="literal"/>
          </wsdl:input>
          <wsdl:output>
            <soap:body namespace="http://www.example.org/test/" use="literal"/>
          </wsdl:output>
        </wsdl:operation>
      </wsdl:binding>
      <wsdl:service name="test">
        <wsdl:port binding="tns:testSOAP" name="testSOAP">
          <soap:address location="http://localhost/test"/>
        </wsdl:port>
      </wsdl:service>
    </wsdl:definitions>
    

Every time I run following code:

    
    
    from ZSI.ServiceProxy import ServiceProxy
    service = ServiceProxy('test.wsdl')
    service.NewOperation('test')
    

I receive:

    
    
    (...)
    /var/lib/python-support/python2.5/ZSI/TCcompound.pyc in cb(self, elt, sw, pyobj, name, **kw)
        345             f = lambda attr: pyobj.get(attr)                                        
        346             if TypeCode.typechecks and type(d) != types.DictType:                   
    --> 347                 raise TypeError("Classless struct didn't get dictionary")           
        348                                                                                     
        349         indx, lenofwhat = 0, len(self.ofwhat)                                       
    
    TypeError: Classless struct didn't get dictionary
    

I have searched Google for this error and I found couple posts describing
similar problem but with no answer. Do you know was is wrong here? Is there an
error in the WSDL, do I miss something in the code or there is a bug in ZSI?

Thank you in advance for you help :-)


Answer: Finally, I have found the solution.

I should run like this:

    
    
    from ZSI.ServiceProxy import ServiceProxy
    service = ServiceProxy('test.wsdl')
    service.NewOperation(NewOperationRequest='test')
    

The reason of the problem was that the name of the parameter was missing
(sic!) - silly error ;-)

