经常会遇到下载的文件或电子书，名字中间都包含了一些网址信息，实际使用中由于名字太长不方便，下面的脚本使用正则表达式来对目录下的所有文件重命名：
例如：

修改前：[呐喊教程]Mac OS X for Unix Geeks[www.yiidian.com].mobi
修改后：Mac OS X for Unix Geeks.mobi

python代码如下:

import os

import re

def rename_dir(dir,regex,f):

  if not os.path.isdir(dir) or not os.path.exists(dir) : 

    print("The input is not one directory or not exist.")

  for root,subdirs,files in os.walk(dir):

    for name in files:

      oldname = name          

      newname = re.sub(regex,f,name)

      print("Before : " + os.path.join(root,oldname))

      print("After  :  " + os.path.join(root,newname))

      if not name == newname and not os.path.exists(os.path.join(root,newname)):

        os.rename(os.path.join(root,oldname),os.path.join(root,newname))

    for dir in subdirs:

        rename_dir(os.path.join(root,dir))
rename_dir("C:\\Python31\\test","\[.*\](.*)\[www.yiidian.com\](.*)",lambda m:m.group(1)+m.group(2))

用perl写了下，感觉代码也没有少写多少

use strict;

use warnings;

use File::Find;

my $regex = "\\[.*\\](.*)\\[www.yiidian.com\\](.*)";

# $replace doesn't work

my $replace = "\$1\$2";
sub wanted {

 my $name = $File::Find::name;

 if( -f $name){

   my $newname =$name;

   $newname =~ s/$regex/$1$2/;

   print "Before: $File::Find::name\n";

   print "After : $newname\n";

   if( !-e $newname) {

     rename($name, $newname);

   }

 }

}
sub rename_dir{

  my ($dir,) = @_;

  if (!-d $dir || !-e $dir){

    print"The input is not directory or not exist.";

  }

  find(\&wanted, $dir);

}

&rename_dir("c:\\perl\\test");

perl 实现2

use strict;

use warnings;

my $regex = "\\[.*\\](.*)\\[www.yiidian.com\\](.*)";

# $replace doesn't work

my $replace = "\$1\$2";
sub rename_dir{

    my $dir = shift;

    if (!-d $dir || !-e $dir){

      print"The input is not directory or not exist.";

    }

    opendir(DIR, $dir) || die "Cannot opendir $dir.";

    foreach (readdir(DIR)) {

      if ($_ eq '.' || $_ eq '..') {next;}

      my $name = $dir.'/'.$_;

      if(-d $name){ 

        rename_dir($name);         

        next;

        }

      my $newname =$_;

      $newname =~ s/$regex/$1$2/;

      $newname = $dir.'/'.$newname;

      print "Before : $name\n";

      print "After  : $newname\n";

      rename($name,$newname);

    }

    #closedir(DIR);

}

&rename_dir("c:\\perl\\test");