Python简单实现查找一个字符串中最长不重复子串的方法

#!usr/bin/env python
#encoding:utf-8
'''''
__Author__:沂水寒城
功能：找出来一个字符串中最长不重复子串
'''
def find_longest_no_repeat_substr(one_str):
  '''''
  找出来一个字符串中最长不重复子串
  '''
  res_list=[]
  length=len(one_str)
  for i in range(length):
    tmp=one_str[i]
    for j in range(i+1, length):
      if one_str[j] not in tmp:
        tmp+=one_str[j]
      else:
        break
    res_list.append(tmp)
  res_list.sort(lambda x,y:cmp(len(x),len(y)))
  return res_list[-1]
if __name__ == '__main__':
  one_str_list=['120135435','abdfkjkgdok','123456780423349']
  for one_str in one_str_list:
    res=find_longest_no_repeat_substr(one_str)
    print '{0}最长非重复子串为：{1}'.format(one_str, res)