tree = ET.parse('data.xml')
root = tree.getroot()

for student in root.findall('student'):
  sid = student.get('id')
  name = student.find('name').text
  age = student.find('age').text
  print(f"ID: {sid}, Name: {name}, Age: {age}")

class StudentHandler(xml.sax.ContentHandler):
  def init(self):
    self.current = ""
    self.name = ""
    self.age = ""

  def startElement(self, tag, attrs):
    if tag == "student":
      print("Student ID:", attrs["id"])

  def characters(self, content):
    if self.current == "name":
      self.name += content
    elif self.current == "age":
      self.age += content

  def endElement(self, tag):
    if tag == "name":
      print("Name:", self.name)
      self.name = ""
    elif tag == "age":
      print("Age:", self.age)
      self.age = ""
    self.current = ""

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

tree = etree.parse('data.xml')
root = tree.getroot()

使用 XPath 查找所有学生姓名

names = root.xpath('//student/name/text()')
for name in names:
  print(name)

创建根节点

root = ET.Element("students")

添加子节点

stu = ET.SubElement(root, "student", id="3")
ET.SubElement(stu, "name").text = "Charlie"
ET.SubElement(stu, "age").text = "23"

写入文件

tree = ET.ElementTree(root)
tree.write("output.xml", encoding="utf-8", xml_declaration=True)