使用python从文本文件中仅获取xml数据

import xml.etree.ElementTree as ET

def extract_xml_from_file(file_path):
    with open(file_path, 'r', encoding='utf-8') as file:
        content = file.read()
    
    # 假设XML数据包裹在特定的开始和结束标签中
    start_tag = '<root>'
    end_tag = '</root>'
    
    start_index = content.find(start_tag)
    end_index = content.find(end_tag, start_index + len(start_tag))
    
    if start_index != -1 and end_index != -1:
        xml_data = content[start_index:end_index + len(end_tag)]
        try:
            root = ET.fromstring(xml_data)
            return root
        except ET.ParseError as e:
            print(f"XML解析错误: {e}")
            return None
    else:
        print("未找到XML数据")
        return None

# 使用示例
file_path = 'data.txt'
xml_root = extract_xml_from_file(file_path)
if xml_root is not None:
    print(ET.tostring(xml_root, encoding='utf-8').decode('utf-8'))