汽车类

class Car:
    def __init__(self,make,model,year):
        self.make=make
        self.model=model
        self.year=year
        self.odometer_reading=0

    def get_descriptive_name(self):
        name=f"{self.year} {self.make} {self.model}"
        return name

    def read_odometer(self):
        print(f"This car has{self.odometer_reading}miles on it")

    def update_odometer(self,mileage):
        if mileage>=self.odometer_reading:
            self.odometer_reading=mileage
        else:
            print("You can't roll back an odometer")

    def increment_odometer(self,miles):
        self.odometer_reading+=miles

class Battery:
    def __init__(self,battery_size=75):
        self.battery_size=battery_size

    def describe_battery(self):
        print(f"This car has a {self.battery_size}-kwh battery")
    def get_range(self):
        if self.battery_size==75:
            range=260
        else:
            range=315

        print(f"This car can go about {range} miles on a full charge.")

class Electric(Car):
    def __init__(self,make,model,year):
        super().__init__(make,model,year)
        self.battery = Battery()


my_tesla = Electric('tesla','model s',2019)
print(my_tesla.get_descriptive_name())
my_tesla.battery.describe_battery()
my_tesla.battery.get_range()

car = Car('Audi','A8L',2020)
print(car.get_descriptive_name())
car.update_odometer(23500)
car.read_odometer()
car.increment_odometer(100)
car.read_odometer()