python-----批量操作xml文件（新建、增、删、改、查）

最近需要处理xml文件，学习并整理了一些常用的操作，代码如下：

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2019/7/9 15:16
# @Author  : xiaodai
import xml.etree.ElementTree as ET
from lxml import etree
from tqdm import tqdm
import os


def creat_xml(xml_file,x,y,w,h):
    """
    新建xml文件
    :param xml_file: xml
    :param x: xmin
    :param y: ymin
    :param w: 宽
    :param h: 高
    :return:
    """
    root = etree.Element("annotation")    # 创建根节点 annotation
    child1 = etree.SubElement(root, "folder")
    child1.text = "VOC2007"
    object = etree.SubElement(root, "object")   # 创建annotation节点的子节点 object
    namen = etree.SubElement(object, "name")    # 创建object节点的子节点 name
    namen.text = 'person'      # name的值为person
    bndbox = etree.SubElement(object, "bndbox")
    xminn = etree.SubElement(bndbox, "xmin")
    xminn.text = str(x)
    yminn = etree.SubElement(bndbox, "ymin")
    yminn.text = str(y)
    xmaxn = etree.SubElement(bndbox, "xmax")
    xmaxn.text = str(x + w)
    ymaxn = etree.SubElement(bndbox, "ymax")
    ymaxn.text = str(y + h)
    weight = etree.SubElement(bndbox, "box_w")
    weight.text = str(w)
    height = etree.SubElement(bndbox, "box_h")
    height.text = str(h)
    tree = etree.ElementTree(root)
    tree.write(xml_file, pretty_print=True, xml_declaration=False, encoding='utf-8')


def edit_xml(xml_file):
    """
    修改xml文件
    :param xml_file:xml文件的路径
    :return:
    """
    tree = ET.parse(xml_file)
    objs = tree.findall('object')
    for ix, obj in enumerate(objs):
        name = obj.find('name').text
        if name == 'mouse':
            print(xml_file)
            obj_new = obj.find('bndbox')
            xmin = str( 1280 - int(obj_new.find('xmin').text))
            xmax = str( 1280 - int(obj_new.find('xmax').text))
            obj_new.find('xmin').text = xmin     # 修改节点值
            obj_new.find('xmax').text = xmax

            conf = obj_new.find('conf')
            conf.tag = 'fenshu'        # 修改节点名

            newEle = ET.Element("NewElement1")
            newEle.text = "new element"
            obj_new.append(newEle)              # 新增节点

            newEle = obj_new.find('xmin')
            obj_new.remove(newEle)                 # 删除节点

            obj_new.set('key','value')    # 给bndbox节点设置属性       <bndbox key="value">
            
            tree.write(xml_file,method='xml',encoding='utf-8')       # 更新xml文件



if __name__ == '__main__':
    path = r'F:\temp\tmp_0709'
    xml_files = [os.path.join(rootdir, file) for rootdir, _, files in os.walk(path) for file in files if
                 (file.endswith('.xml'))]
    for xml in tqdm(xml_files):
        edit_xml(xml)   # 修改xml文件
    for i in tqdm(range(10)):
        xml = os.path.join(path,str(i)+'.xml')
        creat_xml(xml,32,120,80,80)   # 新建xml文件