In [1]:
class System:
    pass

In [2]:
class Status:
    
    def __init__(self):
        self._attributes = 0
        self._skills = 0

In [3]:
class Person:
    
    def __init__(self, name, age):
        self._name = name
        self._age = age

In [4]:
class Attribute:
    
    def __init__(self, name, description, value):
        self._name = name
        self._description = description
        self._value = value

In [5]:
class Skill:
    
    def __init__(self, name, description, level):
        self._name = name
        self._description = description
        self._level = level

In [ ]:
class Shop:
    
    def __init__(self):