car.py

# -*-coding:utf-8-*-
class Car():
 """一次模拟汽车的简单尝试"""

 def __init__(self, make, model, year):
 """初始化描述汽车的属性"""
 self.make = make
 self.model = model
 self.year = year
 self.odometer_reading = 0

 def get_descriptive_name(self):
 """返回整洁的描述性名称"""
 long_name = str(self.year) + ' ' + self.make + ' ' + self.model
 return long_name.title()

 def read_odometer(self):
 """打印一条消息，指出汽车的里程"""
 print("This car has " + str(self.odometer_reading) + " miles on it.")

 def update_odometer(self, mileage):
 """
 将里程表读数设置为指定的值
 拒绝将里程表往回拨
 """
 if mileage >= self.odometer_reading:
 self.odometer_reading = mileage
 else:
 print("You can't roll back an odometer!")

 def increment_odometer(self, miles):
 """将里程表读数增加指定的量"""
 self.odometer_reading += miles