反转整数7

class (object):
    def reverse(self, x):
        """
        :type x: int
        :rtype: int
        """
        if not x:
            return x
        x_str = str(abs(x))
        x_reverse = int(x_str[::-1])

        if x < 0:
            x_reverse = -x_reverse
        if x_reverse > -2**31 and x_reverse < 2**31 - 1:
            return x_reverse
        return 0


print(Solution().reverse(-123))