python实现批量更改xml文件中内容替换

import os
import io
#paths文件目录，files保存文件路径以及名字
paths='/home/xiaobumidm/Yolo_mark-master/VOC数据集/VOC/'
files=[]
oldStr='basstom'
newStr='base>custom'
for file in os.listdir(paths):
    if file.endswith('.xml'):
        files.append(paths+file)
for file in files:
    with open(file, "r", encoding="utf-8") as f:
        lines=f.readlnes()#将文件内容保存到内存
    with open(file, "w", encoding="utf-8") as f_w:
        for line in lines:#将内存中的文件逐行读取
            if oldStr in line:
                line=line.replace(oldStr,newStr)#新内容代替旧内容
            f_w.write(line)

参考链接：https://www.cnblogs.com/bigberg/p/6489043.html