suds soap dict结果上的setdefault()

给定以下通用代码:

def soapQuery():
    soapuser = "Base64String"
    soappass = "Base64String"
    soapurl = 'https://url/file.ext?wsdl'
    ntlm = WindowsHttpAuthenticated(username=soapuser, password=soappass)
    client = Client(soapurl, transport=ntlm)
    result = client.service.method(something='somethingtosearchfor')
    soapfiltered = []
    for record in result.SoapRecord:
        soapfiltered.extend((str(record.value1), str(record.value2), str(record.value3), str(record.value4)))
    return zip(*[iter(soapfiltered)]*4)

运行时,我收到以下错误:

AttributeError:SoapRecord实例没有属性“value3”

最多 属于 result.SoapRecord 返回的将包含所有4 record.value 是的,但有些没有。是否有方法设置要返回的默认值,如 None 或 Null ? 我试过投掷 record.setdefault('value3', None) 但它不起作用。如有任何帮助,将不胜感激。提前谢谢。