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>
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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)
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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
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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nodefor country in root.findall('country'):
rank = int(country.find('rank').text)
if rank > 50:
root.remove(country)
tree.write('output.xml')
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