方法一:直接使用字符串切片功能逆转字符串
#!usr/bin/env python # encoding:utf-8 def strReverse(strDemo): return strDemo[::-1] print(strReverse('pythontab.com'))
方法二:遍历构造列表法
#!usr/bin/env python # encoding:utf-8 def strReverse(strDemo): strList=[] for i in range(len(strDemo)-1, -1, -1): strList.append(strDemo[i]) return ''.join(strList) print(strReverse('pythontab.com'))
方法三:使用reverse函数
#!usr/bin/env python # encoding:utf-8 def strReverse(strDemo): strList = list(strDemo) strList.reverse() return ''.join(strList) print(strReverse('pythontab.com'))
方法四:借助collections模块方法extendleft
#!usr/bin/env python # encoding:utf-8 import collections def strReverse(strDemo): deque1=collections.deque(strDemo) deque2=collections.deque() for tmpChar in deque1: deque2.extendleft(tmpChar) return ''.join(deque2) print(strReverse('pythontab.com'))
方法五:递归实现
#!usr/bin/env python # encoding:utf-8 def strReverse(strDemo): if len(strDemo)<=1: return strDemo return strDemo[-1]+strReverse(strDemo[:-1]) print(strReverse('pythontab.com'))
方法六:借助基本的Swap操作,以中间为基准交换对称位置的字符
#!usr/bin/env python #encoding:utf-8 def strReverse(strDemo): strList=list(strDemo) if len(strList)==0 or len(strList)==1: return strList i=0 length=len(strList) while i < length/2: strList[i], strList[length-i-1]=strList[length-i-1], strList[i] i+=1 return ''.join(strList) print(strReverse('pythontab.com'))
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