Python利用lxml库实现XML处理

from lxml import etree
# 创建根元素
root = etree.Element('root')
# 创建子元素
element = etree.SubElement(root, 'element')
# 设置元素的文本内容
element.text = 'Text content'
# 设置元素的属性
element.set('key', 'value')
# 打印XML数据
print(etree.tostring(root, pretty_print=True).decode())

from lxml import etree
xml_data = """
<root>
    <element key="value">Text content</element>
    <element key="another_value">Another text content</element>
</root>
"""
root = etree.fromstring(xml_data)
# 使用XPath查询找到所有的'element'元素
elements = root.xpath('//element')
for element in elements:
    print('Tag:', element.tag)
    print('Attributes:', element.attrib)
    print('Text content:', element.text)

from lxml import etree
class ElementHandler:
    def start(self, tag, attrib):
        self.current_tag = tag
    def end(self, tag):
        if tag == self.current_tag:
            print('End of', tag)
    def data(self, data):
        print('Data:', data)
    def close(self):
        print('End of document')
handler = ElementHandler()
parser = etree.XMLParser(target=handler)
xml_data = """
<root>
    <element key="value">Text content</element>
    <element key="another_value">Another text content</element>
</root>
"""
etree.parse(StringIO(xml_data), parser)