[Leetcode][python]Integer to Roman

class Solution(object):
    def intToRoman(self, num):
        """
        :type num: int
        :rtype: str
        """
        # table = {'M':1000, 'CM':900, 'D':500, 'CD':400, 'C':100, 'XC':90, 'L':50, 'XL': 40, 'X':10, 'IX':9, 'V':5, 'VI':4, 'I':1}
        # dict无法确定遍历顺序
        roman = [ "M", "CM", "D", "CD", "C", "XC", "L", "XL", "X", "IX", "V", "IV", "I" ]
        integer = [ 1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1 ]
        result = ''
        for i in range(0, len(integer)):
            while num >= integer[i]:
                result += roman[i]
                num -= integer[i]
        return result