Question

我无法使用继承调用父类的变量和构造函数。

class base():
    #age =24;
    def __init__(self,age):
        self.age = age;
        print("i am in base")

class Date(base):
    def __init__(self,year,month,date):
        self.year = year
        self.month = month
        self.date = date

class time(Date):
    def greet(self):
        print('i am in time')

a = time(1,2,4)
print(a.year)
print(a.age) #this line is throwing error...

请帮助，如何调用父类的构造函数

Answer 1

您在示例中所做的不是多重继承。多重继承是指同一类从多个基类继承。

您遇到的问题是因为没有一个子类调用父构造函数，因此您需要这样做并传递所需的参数：

class Date(base):
    def __init__(self, age, year, month, date):
        super().__init__(age)
        self.year = year
        self.month = month
        self.date = date

class time(Date):
    def __init__(self, age, year, month, date):
         super().__init__(age, year, month, date)

    def greet(self):
        print('i am in time')

无法使用参数化的构造函数进行多重继承

1 个答案: