【LeetCode】345. 反转字符串中的元音字母

题目

给你一个字符串 s ，仅反转字符串中的所有元音字母，并返回结果字符串。
元音字母包括 ‘a’、‘e’、‘i’、‘o’、‘u’，且可能以大小写两种形式出现。

示例 1：

输入：s = "hello"
输出："holle"

示例 2：

输入：s = "leetcode"
输出："leotcede"

程序代码(Python版)

class Solution:
    def reverseVowels(self, s: str) -> str:
        s_ = "aeiouAEIOU"
        s = list(s)
        left = 0
        right = len(s)-1
        while left<=right:
            if s[left] in s_ and s[right] in s_:
                tmp = s[left]
                s[left] = s[right]
                s[right] = tmp
                left = left+1
                right = right-1
            elif s[left] in s_ and s[right] not in s_:
                right = right-1
            elif s[left] not in s_ and s[right] in s_:
                left = left+1
            else:
                left = left+1
                right = right-1
        s =''.join(s)
        return s