[Leet Code] Reverse Vowels of a String

Leet code: https://leetcode.com/problems/reverse-vowels-of-a-string/

Problem:

Given a string s, reverse only all the vowels in the string and return it.

The vowels are 'a', 'e', 'i', 'o', and 'u', and they can appear in both cases.

Example 1:

Input: s = "hello"
Output: "holle"

Example 2:

Input: s = "leetcode"
Output: "leotcede"

Solution:

class Solution(object):
    def reverseVowels(self, s):
        """
        :type s: str
        :rtype: str
        """
        vowels = ["a", "e", "i", "o", "u", "A", "E", "I", "O", "U"]
        if s == "":
            return ""
        s = list(s)
        ending = len(s) -1
        starting = 0
        while starting < ending:
            if s[starting] in vowels:
                if s[ending] in vowels:
                    temp = s[starting]
                    s[starting] = s[ending]
                    s[ending] = temp
                    starting += 1
                    ending -= 1
                else:
                    ending -= 1
            elif s[ending] in vowels and s[starting] not in vowels:
                starting +=1 
            else:
                starting += 1
                ending -= 1 
        return "".join(s)