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编写一个函数，以字符串作为输入，反转该字符串中的元音字母。

示例 1：

输入："hello"
输出："holle"

示例 2：

输入："leetcode"
输出："leotcede"

解法

• Python

class Solution:
    def reverseVowels(self, s: str) -> str:
        vowel = ['a','e','i','o','u','A','E','I','O','U']
        strls = [i for i in s]
        left,right = 0,len(strls)-1

        while left < right:
            while (strls[right] not in vowel) and left < right:
                right -= 1
            while (strls[left] not in vowel) and left < right:
                left += 1
            strls[left],strls[right] = strls[right], strls[left]
            left += 1
            right -= 1
        return ''.join(strls)