尝试从完整的XML文件中提取相同属性名称的值，但仅获得第1行值

import xml.etree.ElementTree as ET

def extract_attribute_value(xml_file, attribute_name):
    tree = ET.parse(xml_file)
    root = tree.getroot()

    values = []
    for elem in root.iter():
        if attribute_name in elem.attrib:
            values.append(elem.attrib[attribute_name])

    if values:
        return values[0]
    else:
        return None

# 示例用法
xml_file = 'example.xml'  # 替换为你的XML文件路径
attribute_name = '属性名称'  # 替换为你要提取的属性名称

result = extract_attribute_value(xml_file, attribute_name)
print(result)