Question

   class Vehicle():

        def __init__(self, brand, model):

            print('Am a vehicle')

        def brand_name(self, brand):
            print('vehicle class')
            self.brand = brand
            return brand


        def Vehicle_model(self, model):
            print('vehicle class')

            self.model = model
            return model


     class Mazda(Vehicle):
            def __init__(self, model, brand):



            Vehicle.__init__(self,brand, model)

            def brand_name(self, brand):
                print('base class method')
                self.brand = brand
                print(brand +" " +'is a good brand')

            def Vehicle_model(self, model):
                print('base class method')
                self.model = model
                print('i am a '+ ' '+ self.model +''+self.brand+"model") 


     maz = Mazda(2019,'camry')   
     output>>>   Am a vehicle

     maz.brand_name('Toyota')
     output>>> vehicle class
     output>>  'Toyota'

我想重写基类中的方法，但是当我尝试使用派生类对象在派生类内部调用该方法时，它不符合我的期望。我希望派生类的方法可以执行而不是基类，请大家我在做什么错了

Answer 1

在缩进后尝试代码：

class Vehicle():

    def __init__(self, brand, model):

        print('Am a vehicle')

    def brand_name(self, brand):
        print('vehicle class')
        self.brand = brand
        return brand


    def Vehicle_model(self, model):
        print('vehicle class')

        self.model = model
        return model


class Mazda(Vehicle):
    def __init__(self, model, brand):
        Vehicle.__init__(self,brand, model)

    def brand_name(self, brand):
        print('base class method')
        self.brand = brand
        print(brand +" " +'is a good brand')

    def Vehicle_model(self, model):
        print('base class method')
        self.model = model
        print('i am a '+ ' '+ self.model +''+self.brand+"model") 


maz = Mazda(2019,'camry')

maz.brand_name('Toyota')

一切正常。

Answer 2

Vehicle（）类：

    def __init__(self, brand, model):

        print('Am a vehicle')

    def brand_name(self, brand):
        print('vehicle class')
        self.brand = brand
        return brand


    def Vehicle_model(self, model):
        print('vehicle class')

        self.model = model
        return model


 class Mazda(Vehicle):
        def __init__(self, model, brand):
            Vehicle.__init__(self,brand, model)  # your problem was here wrong indentation

        def brand_name(self, brand):
            print('base class method')
            self.brand = brand
            print(brand +" " +'is a good brand')

        def Vehicle_model(self, model):
            print('base class method')
            self.model = model
            print('i am a '+ ' '+ self.model +''+self.brand+"model")

做好检查缩进，这似乎是问题所在，Vehicle.__init__(self,brand, model)缩进不好。希望对您有帮助

我的代码无法覆盖基类中的方法

2 个答案: