Python針對(duì)給定字符串求解所有子序列是否為回文序列的方法

#!usr/bin/env python
# -*- coding:utf-8 -*-
'''''
__AUthor__:沂水寒城
功能：對(duì)指定字符串尋找所有回文子序列
'''
def is_huiwen(one_str_list):
  '''''
  輸入一個(gè)字符串列表，判斷是否為回文序列
  '''
  if len(one_str_list)==1:
    return True
  else:
    half=len(one_str_list)/2
    if len(one_str_list)%2==0:
      first_list=one_str_list[:half]
      second_list=one_str_list[half:]
    else:
      first_list=one_str_list[:half]
      second_list=one_str_list[half+1:]
    if first_list==second_list[::-1]:
      return True
    else:
      return False
def get_list_all_sub_list(num_list):
  '''
  輸入一個(gè)列表，返回該列表所有的子列表，這里定義的空列表不屬于子列表，故：子列表最小長(zhǎng)度為1
  '''
  if len(num_list)==1:
    return [num_list]
  sub_list=get_list_all_sub_list(num_list[:-1])
  extra=num_list[-1:]
  temp_list=[]
  for one in sub_list:
    temp_list.append(one+extra)
  return sub_list+temp_list
def slice_func(one_str):
  '''''
  '''
  result_list=[]
  for i in range(1,len(one_str)):
    result_list.append(one_str[:i])
    result_list.append(one_str[i:])
  result_list+=list(one_str)
  result_list.append(one_str)
  return list(set(result_list))
def main_func2():
  '''''
  主調(diào)用函數(shù)
  '''
  str_list=['abdc','abba']
  for one_str in str_list:
    result_list=slice_func(one_str)
    print '-----------------------------------------------'
    for one in result_list:
      if is_huiwen(list(one)):
        print one+'是回文序列'
def main_func1():
  '''''
  主調(diào)用函數(shù)
  '''
  str_list=['abdc','abba']
  for one_str in str_list:
    one_str_list=list(one_str)
    one_all_sub_list=get_list_all_sub_list(one_str_list)
    print '------------------------------------------------'
    print one_all_sub_list
    for one in one_all_sub_list:
      if is_huiwen(one):
        print ''.join(one)+'是回文序列'
if __name__ == '__main__':
  print "億速云測(cè)試結(jié)果："
  main_func2()