如何用嵌套的对象初始化空的构造函数？

class Person:
    def __init__(self):
        self.name = ''
        self.age = 0
        self.address = Address()  # 嵌套的对象初始化

class Address:
    def __init__(self):
        self.street = ''
        self.city = ''
        self.country = ''

# 创建一个空的 Person 对象并初始化
person = Person()
person.name = 'John'
person.age = 25
person.address.street = '123 Street'
person.address.city = 'City'
person.address.country = 'Country'

print(person.name)  # 输出：John
print(person.age)  # 输出：25
print(person.address.street)  # 输出：123 Street
print(person.address.city)  # 输出：City
print(person.address.country)  # 输出：Country