Python3 xml模块的增删改查

xml数据示例

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<data>     <country name="Liechtenstein">         <rank updated="yes">2</rank>         <year updated_by="Alex">2009</year>         <gdppc>141100</gdppc>         <neighbor direction="E" name="Austria" />         <neighbor direction="W" name="Switzerland" />     </country>     <country name="Singapore">         <rank updated="yes">5</rank>         <year updated_by="Alex">2012</year>         <gdppc>59900</gdppc>         <neighbor direction="N" name="Malaysia" />     </country>     <country name="Panama">         <rank updated="yes">69</rank>         <year updated_by="Alex">2012</year>         <gdppc>13600</gdppc>         <neighbor direction="W" name="Costa Rica" />         <neighbor direction="E" name="Colombia" />         <info>             <population>8</population>             <size>960</size>         </info>     </country> </data>

xml数据处理

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import xml.etree.ElementTree as ET   '''xml 数据的处理 ''' tree = ET.parse("xmltest.xml") root = tree.getroot() #数据内存地址 print(root.tag)  #标签   '''遍历所有数据''' for i in root:     print(i.tag,i.attrib)  #attrib 获取属性名     for k in i:         print(k.tag,k.attrib,k.text) #text 文本内容   ''' 遍历某一个标签的值 ''' for ta in root.iter("year"):     print(ta.tag,ta.attrib,ta.text)

XML数据的创建

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'''xml 数据的创建 ''' new_xml = ET.Element("personinfolist") #Element 根节点 personinfo = ET.SubElement(new_xml, "personinfo", attrib={"enrolled": "yes"}) name = ET.SubElement(personinfo, "name")  #SubElement 子节点 name.text = "Alex Li" age = ET.SubElement(personinfo, "age", attrib={"checked": "no"}) sex = ET.SubElement(personinfo, "sex") age.text = '56' personinfo2 = ET.SubElement(new_xml, "personinfo", attrib={"enrolled": "no"}) name = ET.SubElement(personinfo2, "name") name.text = "Oldboy Ran" age = ET.SubElement(personinfo2, "age") age.text = '19'   et = ET.ElementTree(new_xml)  # 生成文档对象 et.write("test.xml", encoding="utf-8", xml_declaration=True) """ xml_declaration 声明xml文件类型 """ ET.dump(new_xml)  # 打印生成的格式

XML数据的修改

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'''xml 数据的修改 ''' for node in root.iter('year'):     new_year = int(node.text) + 1     node.text = str(new_year)     node.set("updated_by", "Alex") tree.write("xmltest.xml")   # 删除node for country in root.findall('country'):     rank = int(country.find('rank').text)     if rank > 50:         root.remove(country) tree.write('output.xml')