dice.py

from dataclasses import dataclass
from enum import IntEnum


class diceType(IntEnum):
    d4 = 4
    d6 = 6
    d8 = 8
    d10 = 10
    d12 = 12
    d20 = 20
    d100 = 100

@dataclass
class Roll:
    amount: int
    dice_type: diceType
    bonus: int

    def getMinRoll(self) -> int:
        return self.amount + self.bonus

    def getMaxRoll(self) -> int:
        return self.amount * self.dice_type + self.bonus

    def __repr__(self) -> str:
        return f"{self.amount}d{self.dice_type}+{self.bonus}"

class RollFactory:

    def __call__(self, dice: str) -> Roll:
        bonus = '0'
        if '+' in dice:
            dice, bonus = dice.split('+')
        amount, dice = dice.split('d')

        return Roll(int(amount), diceType(int(dice)), int(bonus))

rollFactory = RollFactory()