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Capitalism The Game Step 2

Really stuck. I feel like I need to add the second die. Not sure though.

from dice import D6

class Hand(list):
    def __init__(self, size=0, die_class=None, *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 __init__(self):
        super().__init__(size=2, die_class=D6)

    def doubles(self):
        hand = []
        if hand[0] == hand[1]:
            return True
        if hand[0] != hand[1]:
            return False

    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)

Nevermind, figure it out.

    def doubles(self):
        if self[0] == self[1]:
            return True
        if self[0] != self[1]:
            return False
Eldin Guzin
Eldin Guzin
6,010 Points

I have a follow-up question to this, why do we use if self[0] == self[1] ? why didn't we use hand[0]...? What does self mean in this example ? why didn't the first code you wrote above work ?

Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

Eldin Guzin, self refers to the current class instance. The original code does work because hand is defined as an empty list that has none of the properties or methods found in a Hand instance.

The method code is running β€œinside” the class. It does not have a way to reference its instance name. That is, it does not know the name of its variable label (β€œhand”, in this case). β€œself” is a label that is used to point to the same thing as the unknowable variable label points to.

Post back if you need more help. Good luck!!!

1 Answer

Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

Get job figuring it out. As an additional tip, you can replace:

if cond:
    return True
else not cond:
    return False

with the preferred style:

return cond

Aww, that's much more simple/beautiful. Appreciate the additional input. :D

Spencer Hurrle
Spencer Hurrle
3,128 Points

Why would self.dice not work the same? The dice list is created/updated as an attribute in the class through the _by_value method, isn't it?

Chris Freeman
Chris Freeman
Treehouse Moderator 68,423 Points

Spencer Hurrle, in the method _by_value, the list label dice is a variable local to the method and is not accessible outside the method. That is, the attribute self.dice is undefined.