code: def _int_to_roman(number):
      
      roman_conv = [(10, "X"), (9, "IX"), (5, "V"), (4, "IV"), (1, "I")]
  
      result = []
      for (arabic, roman) in roman_conv:
          (factor, number) = divmod(number, arabic)
          result.append(roman * factor)
          if number == 0:
              break
      return "".join(result)
docs: Utility method to convert an int (less than 20) to a roman numeral.