class Solution(object):
    def plusOne(self, digits):
        """
        :type digits: List[int]
        :rtype: List[int]
        """
        d= 1
        sum = 0
        while 1:
            if len(digits)==0:
                break
            sum = sum+digits[-1]*d
            d = d*10
            digits= digits[:-1
 
]
        sum+=1
        l =[]
        while 1:
            if sum == 0:
                break
            x=sum%10
            l.append(x)
            sum=int(sum/10)

        l = l[::-1]
        return l

看了下其他人的解法，看著也都是比較麻煩的處理操作