Q9 Palindrome Number

class Solution(object):
    def isPalindrome(self, x):
        """
        :type x: int
        :rtype: bool
        """
        if x < 0:  # 负数肯定不是回文数
            return False
        x_str = str(x)
        if x_str[::-1] != x_str:
            return False
        return True

a=12321
b=Solution()
print(b.isPalindrome(a))  # True