#!usr/bin/env python 
#encoding:utf-8 
 
''''''' 
__Author__:沂水寒城 
功能：输入一个字符串，倒叙输出 
''' 
 
import collections 
 
 
 
def func1(one_str): 
 ''''' 
 直接使用字符串切片功能逆转字符串 
 ''' 
 return one_str[::-1] 
 
 
def func2(one_str): 
 ''''' 
 将字符串转换为列表使用reverse函数 
 ''' 
 one_str_list = list(one_str) 
 one_str_list.reverse() 
 return ''.join(one_str_list) 
 
 
def func3(one_str): 
 ''''' 
 新建一个列表，从后往前添加元素 
 ''' 
 one_list=[] 
 for i in range(len(one_str)-1,-1,-1): 
  one_list.append(one_str[i]) 
 return ''.join(one_list) 
 
 
def func4(one_str): 
 ''''' 
 借助于collections模块现成的方法extendleft 
 ''' 
 deque1=collections.deque(one_str) 
 deque2=collections.deque() 
 for one_char in deque1: 
  deque2.extendleft(one_char) 
 return ''.join(deque2) 
 
 
def func5(one_str): 
 ''''' 
 递归实现 
 ''' 
 if len(one_str)<=1: 
  return one_str 
 return one_str[-1]+func5(one_str[:-1]) 
 
 
def func6(one_str): 
 ''''' 
 借助基本的Swap操作，以中间为基准交换对称位置的字符 
 ''' 
 one_str_list=list(one_str) 
 if len(one_str_list)==0 or len(one_str_list)==1: 
  return one_str_list 
 i=0 
 length=len(one_str_list) 
 while i < length/2: 
  one_str_list[i], one_str_list[length-i-1]=one_str_list[length-i-1], one_str_list[i] 
  i+=1 
 return ''.join(one_str_list) 
 
 
def main_func(str_list): 
 ''''' 
 主调用函数 
 ''' 
 for one_str in str_list: 
  one_list=[] 
  one=[] 
  one_list.append(func1(one_str)) 
  one_list.append(func2(one_str)) 
  one_list.append(func3(one_str)) 
  one_list.append(func4(one_str)) 
  one_list.append(func5(one_str)) 
  one_list.append(func6(one_str)) 
  print '字符串{0}逆序为：'.format(one_str) 
  print one_list 
 
 
if __name__ == '__main__': 
 str_list=['123456','abcdefg','zyxvuw','Together_CZ'] 
 main_func(str_list)

字符串123456逆序为： 
['654321', '654321', '654321', '654321', '654321', '654321'] 
字符串abcdefg逆序为： 
['gfedcba', 'gfedcba', 'gfedcba', 'gfedcba', 'gfedcba', 'gfedcba'] 
字符串zyxvuw逆序为： 
['wuvxyz', 'wuvxyz', 'wuvxyz', 'wuvxyz', 'wuvxyz', 'wuvxyz'] 
字符串Together_CZ逆序为： 
['ZC_rehtegoT', 'ZC_rehtegoT', 'ZC_rehtegoT', 'ZC_rehtegoT', 'ZC_rehtegoT', 'ZC_rehtegoT']