char.py

import random

class Die:
    def __init__(self, n):
        self.sides = n
    
    def roll(self):
        return random.randint(1, self.sides)

dice = [Die(6), Die(6), Die(6)]

def rollAll(dice):
    result = []
    for d in dice:
        result.append(d.roll())
    
    return result

def sumDice(dice):
    return sum(rollAll(dice))

def rollAttributes(dice):
    attrs = {}
    for attribute in ["Str", "Dex", "Con", "Int", "Wis", "Chr"]:
        attrs[attribute] = sumDice(dice)
    
    return attrs

print(rollAttributes(dice))

class Character:
    def __init__(self, attrs):
        self.attributes = attrs
# and so on...