0345：反转字符串中的元音字母

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14

class Solution:
    def reverseVowels(self, s: str) -> str:
        s = list(s)
        i, j = 0, len(s) -1
        while i < j:
            if s[i].lower() not in 'aeiou':
                i += 1
            elif s[j].lower() not in 'aeiou':
                j -= 1
            else:
                s[i], s[j] = s[j], s[i]
                i += 1
                j -= 1
        return ''.join(s)