力扣345. 反转字符串中的元音字母

原题

class Solution:
    def reverseVowels(self, s: str) -> str:
        left,right,word,ans = 0,len(s)-1,'aeiouAEIOU',list(s)
        while left < right:
            flag1,flag2 = ans[left] in word, ans[right] in word
            if flag1 and flag2:
                ans[left],ans[right] = ans[right],ans[left]
                left += 1
                right -= 1
            left += (1 - int(flag1))
            right -= (1 - int(flag2))
        return ''.join(ans)