integer to roman

class (object):
    def intToRoman(self, num):
        """
        :type num: int
        :rtype: str
        """
        
        #	    I	V	X	L	C	D	M
        #	    1	5	10	50	100	500	1,000
        # special cases
        #Number	4	9	40	90	400	900
        #Note	IV	IX	XL	XC	CD	CM
        
        number = [1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1]
        symbol = ["M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I"]
        # simplest idea is to mod num with largest number then keep doing that
        res = ""
        for i in range(len(number)):
            n = num / number[i]
            num = num % number[i]
            res += n * symbol[i]
        return res