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# Stuck on RPG roller challenge part 2

Hello,

I am stuck on this challenge. I think I have the codes right, but when I try to check the work I get Bummer! Can't get the length of a 'Hand'

I would like some guidance on where I am wrong. Please do not give me answers for this challenge, I would like to know and really solve this.

I would also like to know if there is any difference between these two codes

```    def __init__(self, size = 0, die_class = D20):
super().__init__()
for _ in range(size):
self.append(die_class())
```

and

```    def __init__(self, size = 0, die_class = None):
super().__init__(size = 20, die_class = D20)
```

Below this line are the codes that I have written for this challenge.

dice.py
```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

return int(self) + other

return self + other

class D20(Die):
def __init__(self,size=20):
super().__init__(size)
```
hands.py
```from dice import D20

class Hand(list):

def __init__(self, size = 0, die_class = None):
if not die_class:
raise ValueError("You need to have die_class")
super().__init__(size = 20, die_class = D20)

@classmethod
def roll(cls, number):
if number > 0:
return cls(size = 20, die_class = D20)
number -= 1

@property
def total(self):
return sum(self)
```

MOD

In both `__init__` examples, `super()` refers to the parent class `list`. In the second example, super is passing arguments to `list`. The class `list` does not know what to do with the arguments `die_class` or `size` so nothing happens with them.

```    def __init__(self, size = 0, die_class = None):
super().__init__(size = 20, die_class = D20)
```

So use the first example to initiate the Hand with die_class instances.

You `roll` method is SO close. The size argument should be 2 not 20.

Also, the `number` decrement is unused and not reachable after the return statement.