Python批量更换指定目录文件的扩展名

#encoding=utf-8
#author: walker
#date: 2013-12-06
#function: 深度遍历指定目录，更换指定扩展名
import os
import os.path
#读入指定目录并转换为绝对路径
rootdir = raw_input('root dir:\n')
rootdir = os.path.abspath(rootdir)
print('absolute path:\n' + rootdir)
#读入原扩展名并标准化
old_ext = raw_input('old extension:\n')
old_ext = old_ext.strip()
if old_ext[0] != '.':
    old_ext = '.' + old_ext
#读入新扩展名并标准化
new_ext = raw_input('new extension:\n')
new_ext = new_ext.strip()
if new_ext[0] != '.':
    new_ext = '.' + new_ext
for parent, dirnames, filenames in os.walk(rootdir):
    for filename in filenames:
        pathfile = os.path.join(parent, filename)
        if pathfile.endswith(old_ext):
            new_pathfile = os.path.splitext(pathfile)[0] + new_ext
            print('=======================================================')
            print(pathfile)
            print('-------------------------------------------------------')
            print(new_pathfile)
            print('=======================================================')
            os.rename(pathfile, new_pathfile)

PS：上述功能一个shell命令也可以实现

#将后缀.ini换成.txt
#路径名可以是相对路径或绝对路径
find 路径名  | rename 's/\.ini$/\.txt/'

注意，上面的rename命令是perl版的rename命令。

*** walker ***