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Python Object-Oriented Python Dice Roller Comparing and Combining Dice

Posted by Frank Campos
Frank Campos
4,175 Points

Can somebody help me to use the attrs library that kenneth mentioned?

I did my own version of class Die with the library attrs. I dont know if the code is pythonic but it replaced all the magic method used in this lecture.

import random
import attr


@attr.s
class Die:
    sides = attr.ib()
    value = attr.ib()

    def selection(self, sides=2,value=0):
        # self.sides=sides
        if not sides >= 2:
            raise ValueError("Must have at least 2 sides")
        if not isinstance(sides, int):
            raise ValueError('side must be a whole number')
        self.value = value or random.randint(1, sides)
        return int(self.value)
dice =Die(2,0)
print(dice.selection(9) +2)
print(dice.selection == 100)

#and so on

Kenneth Love can you help me with this?porfavor, and also if we can create the class D6 will be very awesome, too. I have been trying to figure out how to make it works, but I broke my code.

4 Answers

Kenneth Love
STAFF
Kenneth Love
Treehouse Guest Teacher
Kenneth Love
Kenneth Love
Treehouse Guest Teacher

This worked for me. Didn't test everything but made sure the values and sides were set correctly.

import random

import attr


@attr.s
class Die:
    sides = attr.ib(
        default=2,
        validator=attr.validators.instance_of(int)
    )
    value = attr.ib(validator=attr.validators.instance_of(int))

    @sides.validator
    def check_sides(self, attribute, value):
        if not value >= 2:
            raise ValueError("Must have at least two sides")

    @value.default
    def random_value(self):
        return random.randint(1, self.sides)

    @value.validator
    def check_value(self, attribute, value):
        if value and not 0 < value <= self.sides:
            raise ValueError("Value must be in range(0, sides)")

D6 = attr.make_class("D6", {"sides": 6}, bases=(Die,))
Kenneth Love
STAFF
Kenneth Love
Treehouse Guest Teacher
Kenneth Love
Kenneth Love
Treehouse Guest Teacher

What is it doing/not doing that you're not expecting?

Frank Campos
Frank Campos
4,175 Points
Frank Campos
Frank Campos
4,175 Points

I tried to recreate the classes Die and D6, exactly what you did in the videoComparing and Combining Dice, but I could never figure out how to inherent the class Die to the D6 class. My goal is to do exactly what you did in the video with the help of the library attrs. I don't know if I used the library attrs properly. The Die class is working, it can add, compare and so on. I would love to see how you will resolve this with the attrs library. Gracias Kenneth Love

Frank Campos
Frank Campos
4,175 Points
Frank Campos
Frank Campos
4,175 Points

Thank you, Kenneth Love , you are amazing.