code: def decode(roman):
      _rdecode = dict(zip("MDCLXVI", (1000, 500, 100, 50, 10, 5, 1)))
      result = 0
      for r, r1 in zip(roman, roman[1:]):
          rd, rd1 = _rdecode[r], _rdecode[r1]
          result += -rd if rd < rd1 else rd
      return result + _rdecode[roman[-1]]
  
label_desc: Use image node_id 1 for calling a global function with example usage: decode(roman) and returns: unknown