如何将此响应xml转换为json

import xml.etree.ElementTree as ET
import json

def xml_to_json(xml_string):
    root = ET.fromstring(xml_string)
    result = traverse_xml(root)
    json_string = json.dumps(result)
    return json_string

def traverse_xml(element):
    data = {}
    if len(element) == 0:
        return element.text
    for child in element:
        child_data = traverse_xml(child)
        if child.tag in data:
            if type(data[child.tag]) is list:
                data[child.tag].append(child_data)
            else:
                data[child.tag] = [data[child.tag], child_data]
        else:
            data[child.tag] = child_data
    return data

# 示例用法
xml_response = '''
<root>
    <name>John Doe</name>
    <age>30</age>
    <email>john@example.com</email>
    <address>
        <street>Main Street</street>
        <city>London</city>
    </address>
</root>
'''

json_response = xml_to_json(xml_response)
print(json_response)

{
    "root": {
        "name": "John Doe",
        "age": "30",
        "email": "john@example.com",
        "address": {
            "street": "Main Street",
            "city": "London"
        }
    }
}