Python 遍歷文件

import os
import re

zifu = ['<audio id="','" url="','"></audio>']
count = 0
rootdir = 'D:\\LittleWorld\\src\\audio\\common'
list = os.listdir(rootdir)                      #列出文件夾下所有的目錄與文件
for i in range(0,len(list)):
    path = os.path.join(rootdir,list[i])
    if os.path.isfile(path):

        if path.find('mp3') != -1:
            count = count + 1
            xiabiao = path.find("audio")
            newstr = path[xiabiao:len(path)]
            path = zifu[0] + str(count) + zifu[1] + newstr + zifu[2]
            print(path)
        else:
            # print("該文件不是MP3格式：%s"%path)
            pass