如何通过定义将实例公开为属性的类来扩展派生类

class BaseClass:
    def __init__(self):
        self._property1 = None

    @property
    def property1(self):
        return self._property1

    @property1.setter
    def property1(self, value):
        self._property1 = value


class DerivedClass(BaseClass):
    def __init__(self):
        super().__init__()
        self._property2 = None

    @property
    def property2(self):
        return self._property2

    @property2.setter
    def property2(self, value):
        self._property2 = value


# 使用派生类进行扩展
derived_obj = DerivedClass()
derived_obj.property1 = "Value 1"
derived_obj.property2 = "Value 2"

print(derived_obj.property1)  # 输出: Value 1
print(derived_obj.property2)  # 输出: Value 2