python中实现字符串翻转的方法

#字符串反转def reverse (s):  rt = ''  for i in range(len(s)-1,-1,-1):    rt += s[i]  return rtdef reverse2 (s):  li = list(s)  li.reverse()  rt = "".join(li)  return rtdef reverse3 (s):  return s[::-1]def reverse4 (s):  return "".join(reversed(s))from functools import reducedef reverse5 (s):  return reduce(lambda x,y:y+x,s)