Leetcode 166 Fraction to Recurring Decimal

class Solution:
    # @param {integer} numerator
    # @param {integer} denominator
    # @return {string}
    def fractionToDecimal(self, numerator, denominator):
        negativeFlag = numerator * denominator < 0
        numerator = abs(numerator); denominator = abs(denominator)
        numsList = [];count = 0; dictLoop = {}; loopstr = None
        while True:
            numsList.append(str(numerator / denominator))
            numerator = 10 * (numerator%denominator)
            if numerator == 0:  break
            count += 1
            loc= dictLoop.get(numerator)
            if loc:
                loopstr = ''.join(numsList[loc:count])
                break
            dictLoop[numerator] = count
        result = numsList[0]
        if len(numsList) > 1: result += '.'
        if loopstr:
            result += ''.join(numsList[1:len(numsList)-len(loopstr)])  + '(' + loopstr + ')'
        else:
            result += ''.join(numsList[1:])
        if negativeFlag: result = '-' + result
        return result

Leetcode 166 Fraction to Recurring Decimal

原文：http://blog.csdn.net/andrew9tech/article/details/46755207