如何将用户定义类的实例转换为元组

class MyClass:
    def __init__(self, prop1, prop2, prop3):
        self.prop1 = prop1
        self.prop2 = prop2
        self.prop3 = prop3

    def __iter__(self):
        return self.MyIterator(self)

    class MyIterator:
        def __init__(self, obj):
            self.obj = obj
            self.index = 0

        def __iter__(self):
            return self

        def __next__(self):
            if self.index >= 3:
                raise StopIteration
            elif self.index == 0:
                value = self.obj.prop1
            elif self.index == 1:
                value = self.obj.prop2
            else:
                value = self.obj.prop3
            self.index += 1
            return value

# 创建类实例
my_instance = MyClass("value1", "value2", "value3")

# 将类实例转换为元组
my_tuple = tuple(my_instance)

print(my_tuple)  # 输出：('value1', 'value2', 'value3')