python - 读取XML文件

Python读取XML部分信息，并写入文件，代码如下

import xml.etree.ElementTree as ET
import os
from os import listdir
from os.path import join
 
classes = ["face"]

def convert_annotation(image_id):
    in_file = open('E:/fddb/Annotations/%s.xml'%image_id)
    out_file = open('C:/Users/1/Desktop/fddb_ground_truth/%s.txt'%image_id, 'w')
    tree=ET.parse(in_file)
    root = tree.getroot()
    size = root.find('size')
    w = int(size.find('width').text)
    h = int(size.find('height').text)
 
    for obj in root.iter('object'):
        difficult = obj.find('difficult').text
        cls = obj.find('name').text
        if cls not in classes or int(difficult) == 1:
            continue
        cls_id = classes.index(cls)
        xmlbox = obj.find('bndbox')
        b = (float(xmlbox.find('xmin').text), float(xmlbox.find('xmax').text), float(xmlbox.find('ymin').text), float(xmlbox.find('ymax').text))
        out_file.write(" ".join([str(a) for a in b]) + '\n')

image_ids = open('E:/fddb/ImageSets/Main/test.txt').read().strip().split()
for image_id in image_ids:
    convert_annotation(image_id)

 

XML文件示例：

fddb
2002_07_19_big_img_18.jpg

fddb Database
PASCAL VOC2007
flickr
-1


yanyu
yanyu


348
450
3

0