构建器模式：分阶段及时创建对象

import requests

def fetch_car_data():
    response = requests.get("https://api.example.com/car-info")
    return response.json()

builder = CarBuilder()

# Backend API data
car_data = fetch_car_data()
builder.set_model(car_data["model"])
builder.set_year(car_data["year"])

# User input
color = input("Car color: ")
builder.set_color(color)

gps_option = input("GPS feature? (yes/no): ").lower() == "yes"
builder.set_gps(gps_option)

car = builder.build()
print(car)