How do I use classmethods on defs that work without classmethods but don't work when added

Question

There is this code that I would like to add classmethods to but don't know how to get it to work. The code runs fine as is but needs classmethods as stated by the comments

# class definition for an n-sided die

# import packages

import random

class MSdie(object): 
  #constructor here

    def __init__( self ):
        self.sides = 6
        self.roll()

#define classmethod 'roll' to roll the MSdie

    def roll( self ):

        self.value = 1 + random.randrange(self.sides)

        return self.value

#define classmethod 'getValue' to return the current value of the MSdie

    def getValue(  self ):

        return self.value

#define classmethod 'setValue' to set the die to a particular value
    #def setValue(self):

def roller():
    r1 = MSdie()

    for n in range (4):
        print(r1.roll())

roller()

Answer 1

I agree with the comment that these methods SHOULD NOT be made classmethods.

But if you must, you cannot use self there. Self refers to an object, but classmethods are not called on an object, they're called for a class. So you can no longer store the value in the object, because you have none.