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


Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points

Capitalism game 3

This part sounds easy but can anyone point out what I’m missing? Thanks!

from dice import D6

class Hand(list):
    def __init__(self, size=2, die_class=D6, *args, **kwargs):
        if not die_class:
            raise ValueError("You must provide a die class")

        for _ in range(size):

    def _by_value(self, value):
        dice = []
        for die in self:
            if die == value:
        return dice

class CapitalismHand(Hand):
    def ones(self):
        return self._by_value(1)

    def twos(self):
        return self._by_value(2)

    def threes(self):
        return self._by_value(3)

    def fours(self):
        return self._by_value(4)

    def fives(self):
        return self._by_value(5)

    def sixes(self):
        return self._by_value(6)

    def _sets(self):
        return {
            1: len(self.ones),
            2: len(self.twos),
            3: len(self.threes),
            4: len(self.fours),
            5: len(self.fives),
            6: len(self.sixes)
    def doubles(self):
       return self[0]==self[1]

    def reroll(cls):
        if self[0]==self[1]:
            return cls(self)

2 Answers

you are doing great, The reroll method should just return a new instance of the CapitalismHand class.. that's it..

    def reroll(cls):
        return cls()
Vitaliy Biriukov
Vitaliy Biriukov
14,172 Points

I don't get it much. we're not specifying the class here. How would the programm know that 'cls' is self?

Leo Marco Corpuz
Leo Marco Corpuz
18,975 Points

I’m not sure. I did this challenge a while back so I can’t remember. But my best guess is that cls() refers to the Hand class itself. The code is returning a new instance of the Hand class.

Jiawei Hu
Jiawei Hu
9,740 Points

cls refers to the class that the class method belongs to, which is CapitalismHand in this case.