Python和perl实现批量对目录下电子书文件重命名的代码分享

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：[]Mac OS X for Unix Geeks[www.jb51.net].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","\[.*\](.*)\[www.jb51.net\](.*)",lambda m:m.group(1)+m.group(2))
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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.jb51.net\\](.*)";
# $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");
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perl 实现2

use strict;
use warnings;

my $regex = "\\[.*\\](.*)\\[www.jb51.net\\](.*)";
# $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");
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