Экземпляры как атрибуты; попытка сделать класс ошибкой атрибута

Question

Получена следующая ошибка, но я вижу, что есть созданный мной атрибут, который я установил равным созданному мной классу.

Traceback (most recent call last):
  File "C:/Users/Rachel/Desktop/Practice/ch9.py", line 125, in <module>
    new_tesla.battery.describe_battery()
AttributeError: 'ElectricCar' object has no attribute 'battery'

Это код.

class Battery():
    """Model batter for a electric car"""
    def __init__(self,battery_size = 70):
        self.battery_size = battery_size
    def describe_battery(self):
        """print statement about battery size"""
        print("This car has a " + str(self.battery_size) + "-kWh battery.")
class ElectricCar(Car):
    """Represent a electric car"""
    def __init___(self,make,model,year):
        """
        Initialize attributes of the parent class,
        then initialize attributes specific to electric car
        """
        super().__init__(make,model,year)
        self.battery = Battery()

new_tesla = ElectricCar('Big tesla',"model Z",'2020')
new_tesla.battery.describe_battery()

Изменить: добавлен код для класса Car

class Car():
    def __init__(self,make,model,year):
        """Initializes attributed to describe a car."""
        self.make = make
        self.model = model
        self.year = year
        self.odometer_reading = 0   # default value
        # takes the parameters and stores them as attributes that will be associated with instances
        # made from this class

    def descriptive_name(self):
        """Describes car"""
        print("Make is " + self.make.title() + ", model is " + self.model.title() + " from the year " + self.year)

    def read_odometer(self):
        """Reads odometer"""
        print("This car has " + str(self.odometer_reading) + " miles on it.")

    def update_odometer(self, mileage):
        """
        Set odometer to different value
        Reject change if odometer is rolled back
        """
        if mileage >= self.odometer_reading:
            self.odometer_reading = mileage
        else:
            print("cannot roll back odometer.")
    def fill_gas(self):
        print('Glug glug....')

    def increment_odometer(self,miles):
        """Add the given amount to the odometer reading."""
        if miles > 0:
            self.odometer_reading += miles
        else:
            pass

Я почти уверен, что делаю это правильно. Я скопировал код прямо из cra sh course python. Я вижу, что сделал класс атрибутом .. понятия не имею, что не так.

Answer 1

class ElectricCar(Car):
"""Represent a electric car"""
def __init___(self,make,model,year):
    """
    Initialize attributes of the parent class,
    then initialize attributes specific to electric car
    """
    Car.__init__(self, make, model, year)
    self.battery = Battery()

или

class ElectricCar(Car):
    """Represent a electric car"""
def __init___(self,make,model,year):
    """
    Initialize attributes of the parent class,
    then initialize attributes specific to electric car
    """
    super(ElectricCar, self).__init__(make, model, year)
    self.battery = Battery()

второй метод, класс Car (объект)