code: def _prepare_wsdl_objects(self):
              
              self.UploadDocumentsRequest = self.client.factory.create('UploadDocumentsRequest')
              self.OriginCountryCode  =None
              self.DestinationCountryCode  =None
              self.Usage  ='ELECTRONIC_TRADE_DOCUMENTS'#Default Usage
              self.Documents = []
              self.UploadDocumentsRequest.Documents = []
              self.logger.debug(self.UploadDocumentsRequest)
docs: This is the data that will be used to create your shipment. Create
              the data structure and get it ready for the WSDL request.