__init __()缺少3个必需的位置参数

Question

我正在尝试为类编写代码,并且在类中遇到了巨大的麻烦.问题是我们用一个类编写脚本Car,将speed方法设置为'0',并在一系列十次迭代中显示速度(调用acceleration和brake每次调用五次).我得到的错误是:

Traceback (most recent call last): File "C:/Users/Brown Bear/Documents/Wake Tech/CIS115/Python Documents/Lab14P1.py", line 36, in <module> main() File "C:/Users/Brown Bear/Documents/Wake Tech/CIS115/Python Documents/Lab14P1.py", line 27, in main my_speed = Car() TypeError: __init__() missing 3 required positional arguments: 'make', 'model', and 'speed'

这是输出应该是什么的例子:

Enter model of your car: Prius
Enter make of your car: Toyota
Current speed: 5
Current speed: 10
Current speed: 15
Current speed: 20
Current speed: 25
Current speed: 20
Current speed: 15
Current speed: 10
Current speed: 5
Current speed: 0

这是我的代码:

class Car:
    def __init__(self, make, model, speed):
        self.make = make
        self.model = model
        self.speed = speed

    def accelerate(self):
        self.speed += 5

    def brake(self):
        self.speed -= 5

    def get_make(self):
        return self.make

    def get_model(self):
        return self.model

    def get_speed(self):
        return self.speed


def main():
    manuf = input('Enter the car make: ')
    mod = input('Enter the car model: ')

    my_speed = Car()

    for num in range(5):
        my_speed.accelerate()
        print('Current speed: ', my_speed.get_speed())
    for num in range(5):
        my_speed.brake()
        print('Current speed: ', my_speed.get_speed())

main()

我花了很多时间在这个特定的问题上并尝试了各种各样的方法,我也研究了之前在这里提出的类似问题,但都有点过于复杂,我只需要一个简单的解决方案.任何和所有帮助表示赞赏.谢谢!

Answer 1

当您创建类的实例时,您没有传递任何参数:

 my_speed = Car()

但是你的定义说有3个必需的参数:

def __init__(self, make, model, speed):

所以你需要创建一个Car实例并传递3个参数:make,model和speed.

my_speed = Car(manuf, mod, some_Speed_val)