Python-将类实例名称添加到列表

Question

每次实例化类的对象时，我都想将实例添加到列表中

example_obj_list = []

class RandomObject:
    def __init__(self, some_property):
        self.some_property = some_property

x = RandomObject('purple')
y = RandomObject('blue')
z = RandomObject('brown')

如何为__init__添加一个步骤，以便它自动将每个对象追加到列表中？

Answer 1

如果要在该类中执行此操作，则列表应该是一个类对象：

class RandomObject:

    example_obj_list = []

    def __init__(self, some_property):

        self.property = some_property

        # This is accessing the class attribute (not instance attribute)
        self.example_obj_list.append(self)

x = RandomObject('purple')
y = RandomObject('blue')
z = RandomObject('brown')

# Because this was defined at the class level, it can be accessed via the class itself.
for obj in RandomObject.example_obj_list:
    print(obj.property)

输出：

purple
blue
brown