如何检查SoapAPI是否包含响应

我正在基于唯一数据对soap api执行请求。一些数据无效，给出空响应。我需要检查数据是否为null或包含xml。

from openpyxl import load_workbook
import requests
from xml.etree import ElementTree
wb = load_workbook("file path")
source = wb["Sheet1"]
for i,cniclist in enumerate(source['A']):
cust_no = cniclist.value
cust = source['B'][i]
cust_type = cust.value
url = "url" # I can't write valid url,header and payload data for security purpose
payload = "{}\r\n {}\r\n "
header = {}


现在，我需要在这里包括其他内容

respOnse= requests.request("POST",url,data=payload.format(cust_no,cust_type),headers=headers)
tree = ElementTree.ElementTree(ElementTree.fromstring(response1.text))
root = tree.getroot()


如果任何请求包含空响应，则会出现以下错误：

返回parser.close（）

xml.etree.ElementTree.ParseError：找不到元素：第1行，第0列