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Python Object-Oriented Python Dice Roller RPG Roller

Posted by Alexander Davison
Alexander Davison
65,469 Points

I don't understand the question... ?

Question:

Now update Hand in hands.py. I'm going to use code similar to Hand.roll(2) and I want to get back an instance of Hand with two D20s rolled in it. I should then be able to call .total on the instance to get the total of the two dice. I'll leave the implementation of all of that up to you. I don't care how you do it, I only care that it works.

What is it asking for? :confused:

dice.py 
import random


class Die:
    def __init__(self, sides=2):
        if sides < 2:
            raise ValueError("Can't have fewer than two sides")
        self.sides = sides
        self.value = random.randint(1, sides)

    def __int__(self):
        return self.value

    def __add__(self, other):
        return int(self) + other

    def __radd__(self, other):
        return self + other


class D20(Die):
    def __init__(self):
        super().__init__(sides=20)
hands.py 
class Hand(list):
    @property
    def total(self):
        return sum(self)
Alexander Davison
Alexander Davison
65,469 Points

Tagging Kenneth Love, Steven Parker and Chris Freeman

1 Answer

Paul Bentham
Paul Bentham
24,090 Points
Paul Bentham
Paul Bentham
24,090 Points

You need to provide a method called "role", when roll is passed the argument '2' the class needs to update itself as if 2x D20's have been rolled.

This needs to be done without creating an instance of the class so a @classmethod needs to be used.

Alexander Davison
Alexander Davison
65,469 Points

Great! I'll try this code challenge after eating :D

If I pass, I'll give you a best answer :D

Alexander Davison
Alexander Davison
65,469 Points

What's wrong with this?

class Hand(list):
    @property
    def total(self):
        return sum(self)

    @classmethod
    def roll(cls, amount):
        hand = Hand(amount, D20)
        return hand
Paul Bentham
Paul Bentham
24,090 Points
Paul Bentham
Paul Bentham
24,090 Points

You haven't defined init for the Hand class, that's where you need to put the type of Dice and the size of the hand too, within the init.

If its any consolation I really struggled with this too & am still struggling to get my head around it.