Python关于继承单个类

Car.py:
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):
long_name = str(self.year)+’’+self.make +’’+self.model
return long_name.title()
def read_odometer(self):
print("This car has "+str(self.odometer_reading)+“miles on it”)

def update_odometer(self,mileage):
    if mileage >= self.odometer_reading:
        self.odometer_reading = mileage
    else:
        print("You cannot roll back an odometer")
def increment_odometer(self,miles):
    self.odometer_reading+=miles

my_car.py
from Car import Car

my_new_car = Car(‘audi’,‘a4’,2016)
print(my_new_car.get_descriptive_name())

my_new_car.odometer_reading = 23

my_new_car.read_odometer()

导入整个模块（用句点来访问需要的类）：
import Car
my_beetle = Car.Car(‘volk’,‘beettle’,2018)
print(my_beetle.get_descriptive_name())

my_tesla = Car.ElectricCar(‘tesla’,‘roadter’,2018)
print(my_tesla.get_descriptive_name())