如何在代码后面访问附加属性？

class MyClass:
    def __init__(self, attribute1, attribute2):
        self.attribute1 = attribute1
        self.attribute2 = attribute2

    def get_attribute1(self):
        return self.attribute1

    def set_attribute1(self, value):
        self.attribute1 = value

    def get_attribute2(self):
        return self.attribute2

    def set_attribute2(self, value):
        self.attribute2 = value


# 创建一个 MyClass 实例
my_instance = MyClass("value1", "value2")

# 访问附加属性
print(my_instance.get_attribute1())  # 输出：value1
print(my_instance.get_attribute2())  # 输出：value2

# 修改附加属性
my_instance.set_attribute1("new_value1")
my_instance.set_attribute2("new_value2")

# 输出修改后的附加属性
print(my_instance.get_attribute1())  # 输出：new_value1
print(my_instance.get_attribute2())  # 输出：new_value2