Python Object-Oriented Python Dice Roller RPG Roller

Youssef GHALEM
Youssef GHALEM
Python Development Techdegree Student 4,143 Points

I got this message : Can't get the length of a `Hand` eventhough I'm not asked to provide the __len__ meth for hand cld

Check my code please
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) :
from dice import D20
class Hand(list):
    def total(self):
        return sum(self)

    def roll(self, number_of_dice) :
        slots = []
        for _ in range(number_of_dice) : 
            slots = []
        return slots

1 Answer

Steven Parker
Steven Parker
201,997 Points

The message may be confusing, but it just means that something is wrong with the class. Issues I notice:

  • the instructions ask for a classmethod, but the decorator that creates one is missing
  • the loop keeps setting "slots" to an empty list (so it never has more than one item in it)
  • the method is returning the list itself instead of a new instance with the list in it

About that last issue, I recall distinctly that being a requirement of this challenge (and it still is, I tried it); but the instructions seem to have been recently changed to say "Then return the list"! So the instructions are no longer correct.

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