code: def get_fault(self, reply):
          
          reply = self.replyfilter(reply)
          sax = Parser()
          faultroot = sax.parse(string=reply)
          soapenv = faultroot.getChild('Envelope')
          soapbody = soapenv.getChild('Body')
          fault = soapbody.getChild('Fault')
          unmarshaller = self.unmarshaller(False)
          p = unmarshaller.process(fault)
          if self.options().faults:
              raise WebFault(p, faultroot)
          return (faultroot, p.detail)
docs: Extract the fault from the specified soap reply.  If I{faults} is True,
          an exception is raised.  Otherwise, the I{unmarshalled} fault L{Object}
          is returned.  This method is called when the server raises a
          I{web fault}.
          @param reply: A soap reply message.
          @type reply: str
          @return: A fault object.
          @rtype: tuple ( L{Element}, L{Object} )