不知道怎么修改属性值来输出其他结果，不在类里面修改，而是在调用端来实现改变电瓶容量。
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):
"""返回整洁的描述性信息。"""
long_name = f"{self.year} {self.make} {self.model}"
return long_name.title()
def read_odometer(self):
"""打印一条指出汽车里程的消息。"""
print(f"This car has {self.odometer_reading} miles on it.")
def update_odometer(self, mileage):
"""将里程表读数设置为指定的值。"""
"""禁止将里程表读数往回调。"""
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。"""
if miles >= 0:
self.odometer_reading += miles
else:
print("Roll back forbidden!")
class Battery:
"""一次模拟电动汽车电瓶的简单尝试。"""
def __init__(self, battery_size=75):
"""初始化电瓶的属性。"""
self.battery_size = battery_size
def describe_battery(self):
"""打印一条描述电瓶容量的消息。"""
print(f"This car has a {self.battery_size}-kWh battery.")
def get_range(self):
"""打印一条消息，指出电瓶的续航里程。"""
if self.battery_size == 75:
range = 260
elif self.battery_size == 100:
range = 315
print(f"This car can go about {range} miles on a full charge.")
class ElectricCar(Car):
"""电动汽车的独特之处。"""
def __init__(self, make, model, year):
"""
初始化父类的属性。
再初始化电动汽车特有的属性。
"""
super().__init__(make, model, year)
self.battery = Battery()
my_tesla = ElectricCar('tesla', 'model s', 2019)
print(my_tesla.get_descriptive_name())
my_tesla.battery.describe_battery()
my_tesla.battery.get_range()
输出如下
2019 Tesla Model S
This car has a 75-kWh battery.
This car can go about 260 miles on a full charge.
在不改变bettery_size的默认值的情况下
我想另外再输出一条“This car can go about 315 miles on a full charge.”的消息。该怎么做