gistfile1.py

class roman_int( int ):
	def roman( self ):
		romanNum = []
		symbols = ( ( 'M', 1000 ), ( 'C', 100 ), ( 'XC', 90 ), ( 'L', 50 ), ( 'X', 10 ),
			( 'IX', 9 ), ('V', 5 ) , ( 'IV', 4 ), ( 'I', 1 ) )

		for symbol, value in symbols:
			while self >= value:
				self -= value
				romanNum.append( symbol )

		return roman_str( ''.join( romanNum ) )

class roman_str( str ):
	def fromRoman( self ):
		symbols = { 'M':1000, "D":500, 'C':100, 'L':50, 'X':10, 'V':5, 'I':1 }
		num = 0
		last = 0

		for i, value in enumerate( self[:: -1] ):

			if last < symbols[ value ]:
				num -= symbols[ value ]
			else:
				num += symbols[ value ]
			last = symbols[value]

		return roman_int(num)