code: def int_to_roman(num):
      """
      :type num: int
      :rtype: str
      """
      m = ["", "M", "MM", "MMM"]
      c = ["", "C", "CC", "CCC", "CD", "D", "DC", "DCC", "DCCC", "CM"]
      x = ["", "X", "XX", "XXX", "XL", "L", "LX", "LXX", "LXXX", "XC"]
      i = ["", "I", "II", "III", "IV", "V", "VI", "VII", "VIII", "IX"]
      return (
          m[num // 1000]
          + c[(num % 1000) // 100]
          + x[(num % 100) // 10]
          + i[num % 10]
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: int_to_roman(num) and returns: unknown