如何序列化xml并只获取最深层的节点

import xml.etree.ElementTree as ET

def serialize_xml(xml_string):
    root = ET.fromstring(xml_string)
    deepest_nodes = find_deepest_nodes(root)
    serialized_data = serialize_nodes(deepest_nodes)
    return serialized_data

def find_deepest_nodes(node):
    if len(node) == 0:
        return [node]
    else:
        deepest_nodes = []
        for child in node:
            deepest_nodes.extend(find_deepest_nodes(child))
        return deepest_nodes

def serialize_nodes(nodes):
    serialized_data = []
    for node in nodes:
        serialized_data.append({
            'tag': node.tag,
            'text': node.text,
            'attributes': node.attrib
        })
    return serialized_data

# 示例XML字符串
xml_string = '''
<root>
    <node1>
        <leaf1>Value 1</leaf1>
        <leaf2>Value 2</leaf2>
    </node1>
    <node2>
        <leaf3>Value 3</leaf3>
    </node2>
</root>
'''

serialized_xml = serialize_xml(xml_string)
print(serialized_xml)

[
    {'tag': 'leaf1', 'text': 'Value 1', 'attributes': {}},
    {'tag': 'leaf2', 'text': 'Value 2', 'attributes': {}},
    {'tag': 'leaf3', 'text': 'Value 3', 'attributes': {}}
]