我是Python的初学者,并且我的项目类有问题。因此,结构如下:

main.py(首先,main创建世界实例)

from world import World

world = World()


World知道所有其他类的所有信息(根据需要导入所有信息),并从继承的类PersonAttributes(存储“全局”变量以便所有类都可以访问它们)中初始化带有内容的先前为空的列表。

PersonAttributes

class PersonAttributes:

    MALE_NAMES = []
    FEMALE_NAMES = []
    SURNAMES = []
    PROFESSIONS = []

    BABY = None
    CHILD = None
    TEEN = None
    YOUNGADULT = None
    ADULT = None
    SENIOR = None
    LIFESTAGES = (BABY, CHILD, TEEN, YOUNGADULT, ADULT, SENIOR)


世界

from utilities.person_attributes import PersonAttributes
from life_stage import Baby, Child, Teen, YoungAdult, Adult, Senior

class World(PersonAttributes):

    def __init__(self):

        # Initialize names from files
        self.MALE_NAMES = self.get_male_names()
        self.FEMALE_NAMES = self.get_female_names()
        self.SURNAMES = self.get_surnames()
        self.PROFESSIONS = self.get_professions()

        # Initialize life stages
        self.BABY = Baby(None, None, None, None)
        self.CHILD = Child(None, None, None, None)
        self.TEEN = Teen(None, None, None, None)
        self.YOUNGADULT = YoungAdult(None, None, None, None)
        self.ADULT = Adult(None, None, None, None)
        self.SENIOR = Senior(None, None, None, None)

        self.population = []
        self.populate_world()


World还导入LifeStage类,其中包含从Person继承的不同类。 YoungAdult的示例(问题出在哪里)

class YoungAdult(Person):

    def __init__()

        self.occupation = Randomizer().get_random_list_item(self.PROFESSIONS)




from utilities.person_attributes import PersonAttributes

class Person(PersonAttributes):

    def __init__():
        super(Person, self).__init__()


因此,问题出在自我。专业。我已经在世界中对其进行了初始化,但是当我实例化YoungAdult((self.YOUNGADULT = YoungAdult(None,None,None,None))时,PersonAttributes中的PROFESSIONS列表为空。为什么会发生这种情况,我该如何解决?我无法摆脱self.occupation属性,因为当一个人从Teen年龄增长时,YoungAdult类需要该属性自动拥有一个职业。希望大家能理解我的意思,在此先感谢您!

最佳答案

类和实例属性之间仅存在区别。这可能会引起一些启发:

>>> class K:
...     a = 1
...     def set_a(self, v):
...         self.a = v
...
>>> k = K()
>>> K.a
1
>>> k.a
1
>>> k.set_a(3)
>>> k.a
3
>>> K.a
1
>>> K.a = 5
>>> l = K()
>>> l.a
5
>>> k.a
3

一旦设置了k.a(甚至通过self.a),它就会阴影K.a

关于python - 初始化后获取空列表,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/49303319/

10-09 18:40