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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 can't roll back anodometer!")
'''
def increment_odometer(self,miles):
self.odometer_reading += miles
class Bettery():
def __init__(self,battery_size =70 ):
self.battery_size = battery_size
def describe_battery(self):
print("This car has a " + str(self.battery_size) + "-kwh battery.")
def get_range(self):
if self.battery_size == 70:
range = 240
elif self.battery_size == 85:
range = 270
message = "This car can go approximately" + str(rang)
message += "miles on a full charge."
print(message)
class ElectricCar(Car):
def __init__(self,make,model,year):
super().__init__(make,model,year)
self.battery =Bettery
def describe_battery(self):
print("This car has a " + str(self.battery_size) + '-kwh battery.')
def fill_gas_tank(self):
print("This car don't need a gas tank!")
my_tesla = ElectricCar('tesla','model s',2016)
print(my_tesla.get_descriptive_name())
my_tesla.battery.describe_battery()
my_tesla.battery.get_range()
问题出现在了最后两行
2016 Tesla Model S
Traceback (most recent call last):
File "car.py", line 55, in <module>
my_tesla.battery.describe_battery()
TypeError: describe_battery() missing 1 required positional argument: 'self'
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