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Python Object-Oriented Python Dice Roller Project Breakdown

nakalkucing
nakalkucing
12,964 Points
Posted by nakalkucing
nakalkucing
12,964 Points

When trying to run D6 I keep on getting: AttributeError: type object 'D6' has no attribute 'value' Help please!

Here's my code:

import random


class Die:
    def __init__(self, sides=2, value=0):
        if not sides >= 2:
            raise ValueError("Must have at least 2 sides")
        if not isinstance(sides, int):
            raise ValueError("Sides must be a whole number")
        self.value = value or random.randint(1, sides)


class D6(Die):
    def __init__(self, value=0):
        super().__init__(sides=6, value=value)

I enter the Console and type:

cd yatzy/

python

import dice

d6 = dice.D6

d6.value

...and that's when I get the AttributeError.

Thanx in advance. :)

3 Answers

Alex Koumparos
seal-mask
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,887 Points
Alex Koumparos
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,887 Points

Hi Nakalkucing,

The issue is because you are trying to access the value attribute on the class, not an instance of the class.

In your line:

d6 = dice.d6

You are assigning the d6 class to your d6 variable. If you wanted to assign an instance of d6 to your d6 variable you would add parentheses to instantiate the instance:

d6 = dice.d6()

Hope that clears things up

Cheers

Alex

nakalkucing
nakalkucing
12,964 Points
nakalkucing
nakalkucing
12,964 Points

Thanks Alex! That fixed the problem. :-D

nakalkucing
nakalkucing
12,964 Points
nakalkucing
nakalkucing
12,964 Points

Hi Alex Koumparos I'm now having more trouble with the code. I've done some of the changes in the next video. And I'm now getting this *line 36, in init super().init(sides=6, value=value) TypeError: init() got and unexpected keyword argument 'sides' * But I haven't changed that line. Here's my code. Would you please help me with it?

import random


class Die:
    def __init__(self, sides=2, value=0):
        if not sides >= 2:
            raise ValueError("Must have at least 2 sides")
        if not isinstance(sides, int):
            raise ValueError("Sides must be a whole number")
        self.value = value or random.randint(1, sides)

    def __init__(self):
        return self.value

    def __eq__(self, other):
        return int(self) == other

    def __ne__(self, other):
        return int(self) != other    # Or:   return not int (self) == other

    def __gt__(self, other):
        return int(self) > other

    def __lt__(self, other):
        return int(self) < other

    def __ge__(self, other):
        return int(self) > other or int(self) == other

    def __le__(self, other):
        return int(self) < other or int(self) == other


class D6(Die):
    def __init__(self, value=0):
        super().__init__(sides=6, value=value)
Alex Koumparos
seal-mask
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,887 Points
Alex Koumparos
.a{fill-rule:evenodd;}techdegree
Alex Koumparos
Python Development Techdegree Student 36,887 Points

Hi Nakalkucing,

Your problem is in the Die class where you have two initialisers (which I think is syntactically invalid, but even if it is technically valid it is definitely not Pythonic).

When you try to create a D6 object, D6's initialiser doesn't know which initialiser in super() to call, and is looking at your second one and then getting upset because the second one doesn't take sides as an argument.

The solution is just to delete the extraneous second initialiser.

Cheers

Alex

nakalkucing
nakalkucing
12,964 Points
nakalkucing
nakalkucing
12,964 Points

Hi Alex, I'm not saying you're wrong, but I just cheked with the video and Kenneth's code has the second initialiser. Do you have any ideas to make it work without removing it? If not it's fine. :) Thanks.

nakalkucing
nakalkucing
12,964 Points
nakalkucing
nakalkucing
12,964 Points

Hello again. I found my mistake. :) I had written:

    def __init__(self):
        return self.value

It was supposed to read:

    def __int__(self):
        return self.value

Thanks for your time and help. :)

Best,

Nakal