要求：在Python环境下用尽可能多的方法反转字符串,例如将s = "abcdef"反转成 "fedcba"
【1】：使用字符串切片
result = s[::-1]
【2】：使用列表的reverse方法

l = list(s)l.reverse()result = "".join(l)

【3】：使用reduce
result = reduce(lambda x,y:y+x,s)
【4】：使用递归函数

def fun(s): if len(s)<1: return s return func(s[1:])+[0]result = func(s)

【5】：使用栈

def func(s): l = list(s) #模拟全部入栈 result = "" while len(1)>0: result += 1.pop() #模拟出栈 return resultresult = func(s)

【6】：for循环

def func(s): result = "" max_index = len(s)-1 for index,value in enumerate(s): result += s[max_index-index] return resultresult = func(s)