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def int_to_roman(int_value):
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# if isinstance(int_value, type(1)):
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# raise TypeError("expected integer, got %s" % type(int_value))
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if not 0 < int_value < 4000:
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raise ValueError("Argument must be between 1 and 3999")
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ints = (1000, 900, 500, 400, 100, 90, 50, 40, 10, 9, 5, 4, 1)
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nums = ('M', 'CM', 'D', 'CD', 'C', 'XC',
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'L', 'XL', 'X', 'IX', 'V', 'IV', 'I')
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result = ""
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for i in range(len(ints)):
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count = int(int_value / ints[i])
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result += nums[i] * count
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int_value -= ints[i] * count
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return result
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def int_to_letter(int_value):
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result = ''
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int_value -= 1
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while int_value >= 26:
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rest = int_value % 26
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int_value = int(int_value / 26) - 1
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result = chr(rest + 65) + result
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result = chr(int_value + 65) + result
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return result
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