@dataclass — the class shape ai ships in every modern python project

Last drill. Build two dataclasses that fit together:

1. Address — a frozen=True dataclass with two fields:

   • street: str
   • city: str

2. Customer — a regular @dataclass with three fields:

   • name: str
   • address: Address (a nested dataclass — required)
   • orders: list defaulting to field(default_factory=list)

Then create two customers sharing the same address (an Address is immutable, so sharing is fine), append an order to each, and print both.

Expected output:

Customer(name='maya', address=Address(street='1 main st', city='oak'), orders=['#1'])
Customer(name='marcus', address=Address(street='1 main st', city='oak'), orders=['#2'])