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Deniz Kahriman
8,538 PointsWhat am I doing wrong here? Can you please help? Thanks!!!
Now update Hand in hands.py. I'm going to use code similar to Hand.roll(2) and I want to get back an instance of Hand with two D20s rolled in it. I should then be able to call .total on the instance to get the total of the two dice.
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):
super().__init__(sides=20)
from dice import D20
class Hand(list):
def __init__(self, size=0, die_class=D20):
self.size = size
super().__init__()
for _ in range(size):
self.append(die_class())
@classmethod
def roll(cls, size=2)
return cls.size
@property
def total(self):
return sum(self)
4 Answers

Steven Parker
215,939 PointsYou're pretty close, but I see a few issues:
- you forgot the colon (":") at the end of the definition line for the roll method
- cls represents the class itself (not an instance), so you can't take the size property of it
- you want to return an instance of the class, so you'll need to invoke it (with parentheses after the name)
- remember to pass the size argument when you create the instance

Adrian Torrente Tenreiro
12,540 PointsDeniz Kahriman could you comment the code pls? im still really stuck on this

Teeyai Muenchana
5,916 Pointsfrom dice import D20
class Hand(list):
def __init__(self, size=0, die_class=D20):
self.size = size
super().__init__()
for _ in range(size):
self.append(die_class())
@classmethod
def roll(cls, size=2):
return cls(size)
@property
def total(self):
return sum(self)

Trenton Spears
Python Development Techdegree Graduate 16,969 Pointsfrom dice import D20
class Hand(list):
def __init__(self, size=0, die_class=D20):
self.size = size
super().__init__()
for _ in range(size):
self.append(die_class())
@classmethod
def roll(cls, size=2):
return cls(size)
@property
def total(self):
return sum(self)
Thanks to Deniz Kahriman and Steven Parker on this one, this one actually works..Thanks guys!
Deniz Kahriman
8,538 PointsDeniz Kahriman
8,538 PointsThanks, Steven!! Sorry, had to repost the changes I made because there was a typo. I'm stuck again as I don't know what needs to be added to make the code work. Can you please take a look? Thank you again!
Steven Parker
215,939 PointsSteven Parker
215,939 PointsSomehow, you stuck a stray colon on the end of your import line. Otherwise, I think you've got it.
Deniz Kahriman
8,538 PointsDeniz Kahriman
8,538 PointsAhhhh... thanks, Steven!! :)