class Solution:
    """
    @param number: A 3-digit number.
    @return: Reversed number.
    """
    def reverseInteger(self, number):
        return int(str(number)[::-1])
    
if __name__ == "__main__":
    a = input("输入3位整数: ")
    so = Solution()
    print(so.reverseInteger(a))

测试结果