如何为类中可能无法计算的成员设置值？

class MyClass:
    def __init__(self, member1, member2):
        self.member1 = member1
        self.member2 = member2
        self.member3 = "固定值"

obj = MyClass("value1", "value2")
print(obj.member1)  # 输出：value1
print(obj.member2)  # 输出：value2
print(obj.member3)  # 输出：固定值

class MyClass:
    def __init__(self, member1, member2):
        self.member1 = member1
        self.member2 = member2

    @property
    def member3(self):
        return "固定值"

obj = MyClass("value1", "value2")
print(obj.member1)  # 输出：value1
print(obj.member2)  # 输出：value2
print(obj.member3)  # 输出：固定值

class MyClass:
    def __init__(self, member1, member2):
        self.member1 = member1
        self.member2 = member2

    def get_member3(self):
        return "固定值"

obj = MyClass("value1", "value2")
print(obj.member1)        # 输出：value1
print(obj.member2)        # 输出：value2
print(obj.get_member3())  # 输出：固定值