Dict is the key clear solution for Roman Numerals by maximilian.staiger97 - python coding challenges

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Dict is the key solution in Clear category for Roman Numerals by maximilian.staiger97

def checkio(data):
    solution = ""
    numbers = {1000:"M", 900:"CM", 500:"D", 400:"CD",
                100:"C",  90:"XC",  50:"L",  40:"XL",
                 10:"X",   9:"IX",   5:"V",   4:"IV",
                  1:"I"}
    for e in numbers.keys():
        for i in range(int(data/e)):
            solution += numbers[e]
        data %= e
    return solution

if __name__ == '__main__':
    #These "asserts" using only for self-checking and not necessary for auto-testing
    assert checkio(6) == 'VI', '6'
    assert checkio(76) == 'LXXVI', '76'
    assert checkio(499) == 'CDXCIX', '499'
    assert checkio(3888) == 'MMMDCCCLXXXVIII', '3888'

Jan. 8, 2017

Comments:

Ievgenii_Sakhno on Jan. 9, 2017, 8:31 p.m.
Amazing!

oduvan on Jan. 11, 2017, 7:23 p.m.
Well I think this is something new here

DerryK on Jan. 13, 2017, 5:55 a.m.
Very clear and concise! One problem, though, is that the ordering in numbers.keys() is not guaranteed, so you need "sorted(numbers.keys(), reverse=True)". Also I think you could have shortened it further by replacing the inner for loop with "solution += numbers[e] * (data // e)".

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