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First solution in Clear category for Roman Numerals by karwowskit
def checkio(data):
s = ''
for val, roman in zip((1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1),
'M CM D CD C XC L XL X IX V IV I'.split()):
while data >= val:
data -= val
s += roman
return s
April 1, 2019