Python3 XML解析技术深度解析

<school>
    <student id="1001">
        <name>张三</name>
        <score math="90" english="85"/>
    </student>
</school>

from xml.dom.minidom import parse
doc = parse("data.xml")
students = doc.getElementsByTagName("student")
for s in students:
    print(s.getAttribute("id"))

class StudentHandler(xml.sax.ContentHandler):
    def startElement(self, name, attrs):
        if name == "student":
            print("ID:", attrs["id"])

parser = xml.sax.make_parser()
parser.setContentHandler(StudentHandler())
parser.parse("data.xml")

import xml.etree.ElementTree as ET
tree = ET.parse('data.xml')
root = tree.getroot()
for student in root.findall('student'):
    print(student.attrib['id'])

try:
    ET.parse('broken.xml')
except ET.ParseError as e:
    print(f"解析错误:{e.position}: {e.msg}")

namespaces = {'ns': 'http://school.edu/schema'}
for student in root.findall('ns:student', namespaces):
    print(student.find('ns:name', namespaces).text)

# 查找数学成绩大于90的学生
high_scores = root.findall(".//student[score/@math>'90']")

def load_config(config_file):
    config = {}
    tree = ET.parse(config_file)
    for item in tree.findall('setting'):
        config[item.get('key')] = item.text
    return config

@app.route('/api/xml', methods=['POST'])
def handle_xml():
    root = ET.fromstring(request.data)
    # 处理逻辑...
    return ET.tostring(response_xml)

parser = ET.XMLParser(
    target=ET.TreeBuilder(),
    forbid_dtd=True,
    forbid_entities=True
)
safe_tree = ET.parse('input.xml', parser=parser)

from defusedxml.ElementTree import parse
safe_tree = parse('untrusted.xml')

for event, elem in ET.iterparse('large.xml'):
    if elem.tag == 'student':
        process_student(elem)
        elem.clear()  # 及时释放内存

from concurrent.futures import ThreadPoolExecutor

def parse_chunk(xml_chunk):
    return ET.fromstring(xml_chunk)

with open('huge.xml') as f:
    with ThreadPoolExecutor() as executor:
        results = executor.map(parse_chunk, chunk_file(f))