Python修改xml文档之添加删除元素

    工作中同事涉及到用python修改xml文件，网上看了下相关的文章和例子，方法其实挺多的，用了比较简单的方法实现在指定节点中插入和删除相关元素和属性，代码如下：

# -*- coding:UTF-8 -*-

import xml.etree.ElementTree as ET

def add_node():
    x = 0
    for i in devE:
        if i.tag != "serial":
            x += 1
            continue
        else:
            break
    ifE = ET.Element('interface')
    ifE.set('type', 'bridge')
    macE = ET.SubElement(ifE, 'mac')
    macE.set("address", "54:52:00:22:93:88")
    brE = ET.SubElement(ifE, 'source')
    brE.set("bridge", "br1")
    devE.insert(x, ifE)

def del_node():
    for i in devE.findall("interface"):
        if i.find("mac").get("address") == "54:52:00:22:93:88":
            del devE[devE.getchildren().index(i)]

if __name__ == "__main__":
    tree = ET.parse("test1.xml")
    root = tree.getroot()
    devE = root.find('devices')
    add_node()
    #del_node()
    tree.write('test1.xml')