如何从.osm xml文件中提取关系成员

import xml.etree.ElementTree as ET

def extract_members_from_osm_xml(filename):
    members = []
    
    # 解析xml文件
    tree = ET.parse(filename)
    root = tree.getroot()
    
    # 遍历xml文件中的元素
    for relation in root.findall('relation'):
        for member in relation.findall('member'):
            # 提取关系成员的属性
            member_type = member.get('type')
            member_ref = member.get('ref')
            member_role = member.get('role')
            
            # 将关系成员保存到列表中
            members.append({
                'type': member_type,
                'ref': member_ref,
                'role': member_role
            })
    
    return members

# 测试代码
filename = 'example.osm.xml'
members = extract_members_from_osm_xml(filename)
for member in members:
    print(member)