获取python中类的所有实例

class MyClass:
    instances = []

    def __init__(self):
        self.instances.append(self)

# 创建实例
obj1 = MyClass()
obj2 = MyClass()

# 获取所有实例
all_instances = MyClass.instances

class InstanceTracker(type):
    def __init__(cls, name, bases, attrs):
        super().__init__(name, bases, attrs)
        cls.instances = []

    def __call__(cls, *args, **kwargs):
        instance = super().__call__(*args, **kwargs)
        cls.instances.append(instance)
        return instance

class MyClass(metaclass=InstanceTracker):
    pass

# 创建实例
obj1 = MyClass()
obj2 = MyClass()

# 获取所有实例
all_instances = MyClass.instances

def track_instances(cls):
    instances = []

    def wrapper(*args, **kwargs):
        instance = cls(*args, **kwargs)
        instances.append(instance)
        return instance

    wrapper.instances = instances
    return wrapper

@track_instances
class MyClass:
    pass

# 创建实例
obj1 = MyClass()
obj2 = MyClass()

# 获取所有实例
all_instances = MyClass.instances