用Python写的批量文件重命名

# -*- coding: cp936 -*-
"""
Created on Wed Jun 25 16:24:23 2014

@author: Administrator
"""

import os

def doRename():
    fi_num_cnt = 1
    input_max_len = max(list_len)
    preFix=raw_input("请输入文件前缀:\n")
    for ifile in ext_list:
        new_name = preFix+str(fi_num_cnt)+‘.‘+ext
        while True:
            if os.path.exists(new_name):
                fi_num_cnt+=1
                new_name = preFix+str(fi_num_cnt)+‘.‘+ext
            else:
                break

        print ifile.rjust(input_max_len,‘ ‘),3*‘ ‘,‘重命名为:‘.ljust(5,‘ ‘),new_name.rjust(10,‘ ‘)        
        try:
            os.rename(ifile,new_name) 
        except Exception,e:
            print e
        fi_num_cnt +=1
if __name__==‘__main__‘:
    while True:     
        ext = raw_input("请输入要批量命名的文件后缀名：如jpg、txt。直接回车则退出程序\n")
        if ext == ‘‘:
            exit()
        allFiles = os.listdir(os.curdir)    
        ext_list=[]
        list_len=[]
        for ifile in allFiles:
            if os.path.isfile(ifile) and os.path.splitext(ifile)[1][1:].lower()==ext             and ifile != os.path.basename(__file__):
                ext_list.append(ifile)
                list_len.append(len(ifile))
        if len(ext_list)==0:
            print ‘未发现 *.‘,ext,‘类型的文件‘
        else:
            break
        
    print ‘找到如下*.‘,ext,‘文件:‘
    for ifile in ext_list:
        print ifile
    print 25*‘*‘
    
    while True and len(ext_list)!=0:
        choice = raw_input(‘您确定要对这些文件批量重命名吗？(Y/y或直接回车--确定,N/n--取消）\n‘)
        if  choice==‘‘ or choice==‘Y‘ or choice == ‘y‘:
            doRename()
            print ‘处理完毕!‘
            raw_input()
            break
        elif choice == ‘N‘ or choice ==‘n‘:
            break