Leetcode - Single number solution

single_number.py

#https://leetcode.com/explore/challenge/card/30-day-leetcoding-challenge/528/week-1/3283/
class Solution:
    def singleNumber(self, nums: List[int]) -> int:
        
        nums.sort()
        found = 0
        for i in nums:
            if nums.count(i) == 1:
                found = i
        return found