破解栅栏密码python脚本

今天遇到一个要破解的栅栏密码，写了个通用的脚本

 #!/usr/bin/env python
 # -*- coding: gbk -*-
 # -*- coding: utf_8 -*-
 # Author: 蔚蓝行
 # http://www.cnblogs.com/duanv
 e = raw_input('请输入要解密的字符串\n')
 elen = len(e)
 field=[]
 for i in range(2,elen):
             if(elen%i==0):
                 field.append(i)

 for f in field:
     b = elen / f
     result = {x:'' for x in range(b)}
     for i in range(elen):
         a = i % b;
         result.update({a:result[a] + e[i]})
     d = ''
     for i in range(b):
         d = d + result[i]
     print '分为\t'+str(f)+'\t'+'栏时，解密结果为：  '+d