Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python Object-Oriented Python Dice Roller RPG Roller

Kyle Knapp
Kyle Knapp
21,526 Points

RPG roller question

My answer for pt. 2 won't work because "Can't get the length of a 'Hand'." Yet I ran my code in IDLE and it works as expected. I am able to generate Hand instances and get their lengths without issue. Any ideas why it won't work?

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):
        Die.__init__(self, sides=20)
hands.py
class Hand(list):
    def roll(self, numdice):
        for _ in range(numdice):
            self.append(D20())

    @property
    def total(self):
        return sum(self)

1 Answer

Steven Parker
Steven Parker
231,236 Points

Here's a few hints:

  • the challenge expects you to return a new instance, but this code doesn't return anything
  • since a new instance is being created, this should probably be a class method
  • "from dice import D20"
Kyle Knapp
Kyle Knapp
21,526 Points

Thank you Steven