无法从嵌套的xml中获取所有数据

import xml.dom.minidom

def get_all_data_from_xml(xml_string):
    # 创建DOM解析器
    dom = xml.dom.minidom.parseString(xml_string)
    
    # 获取根节点
    root = dom.documentElement
    
    # 递归遍历所有节点
    data = {}
    traverse_node(root, data)
    
    return data

def traverse_node(node, data):
    # 处理当前节点的数据
    node_data = {}
    if node.nodeType == node.ELEMENT_NODE:
        node_data['tag_name'] = node.tagName
        if node.hasAttributes():
            attrs = {}
            for attr_name, attr_value in node.attributes.items():
                attrs[attr_name] = attr_value
            node_data['attributes'] = attrs
        if node.hasChildNodes():
            child_data = []
            for child_node in node.childNodes:
                child_data.append(traverse_node(child_node, {}))
            node_data['children'] = child_data
        if node.firstChild and node.firstChild.nodeType == node.TEXT_NODE:
            node_data['text'] = node.firstChild.data.strip()
    
    # 将当前节点的数据添加到父节点的数据中
    if node.parentNode.nodeType == node.ELEMENT_NODE:
        parent_data = data.setdefault('parent', {})
        parent_data.setdefault('children', []).append(node_data)
    else:
        data.update(node_data)
    
    return node_data

# 示例XML数据
xml_data = '''
<root>
    <person>
        <name>John Doe</name>
        <age>30</age>
        <address>
            <city>New York</city>
            <country>USA</country>
        </address>
    </person>
    <person>
        <name>Jane Smith</name>
        <age>25</age>
        <address>
            <city>London</city>
            <country>UK</country>
        </address>
    </person>
</root>
'''

# 获取所有数据
all_data = get_all_data_from_xml(xml_data)
print(all_data)

{
    "parent": {
        "children": [
            {
                "tag_name": "person",
                "children": [
                    {
                        "tag_name": "name",
                        "text": "John Doe"
                    },
                    {
                        "tag_name": "age",
                        "text": "30"
                    },
                    {
                        "tag_name": "address",
                        "children": [
                            {
                                "tag_name": "city",
                                "text": "New York"
                            },
                            {
                                "tag_name": "country",
                                "text": "USA"
                            }
                        ]
                    }
                ]
            },
            {
                "tag_name": "person",
                "children": [
                    {
                        "tag_name": "name",
                        "text": "Jane Smith"
                    },
                    {
                        "tag_name": "age",
                        "text": "25"
                    },
                    {
                        "tag_name": "address",
                        "children": [
                            {
                                "tag_name": "city",
                                "text": "London"
                            },
                            {
                                "tag_name": "country",
                                "text": "UK"
                            }
                        ]
                    }
                ]
            }
        ]
    }
}