如何在类定义中强制设置属性

class Person:
    def __init__(self, name):
        self.name = name

person = Person("John")

class Person:
    def __init__(self, age):
        self._age = None
        self.age = age

    @property
    def age(self):
        return self._age

    @age.setter
    def age(self, value):
        if isinstance(value, int) and value > 0:
            self._age = value
        else:
            raise ValueError("Age must be a positive integer.")

person = Person(25)