如何检查Soap API是否包含响应

Question

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 = "<CUSTID>{}</CUSTID>\r\n <CUSTTYPE>{}</CUSTTYPE>\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