TypeError:描述符'__init__'需要'超级'对象但收到'str'

Question

使用Python 3.X作为解释器.我刚刚继承了Employee两个派生类的类作为Developer和Manager.

下面的代码抛出了一个类型错误: '__init__' requires a 'super' object but received a 'str'.
我不知道为什么会发生这种情况,我还没有发现该程序有任何问题.

class Employee:
    raise_amount=1.05
    emp_count=0
    def __init__(self,first_name,last_name, amount):
        self.first_name=first_name
        self.last_name=last_name
        self.amount=amount
        self.email_id="{0}.{1}@{1}.com" .format(first_name,last_name)
        Employee.emp_count +=1

    def fullname(self):
        print ("%s %s"%(self.first_name,self.last_name))

    def print1(self):
        print (self.email)
        print ("Total no of Employee are :%d" %(Employee.emp_count))


    def raise_amount(self):
        self.amount *=self.raise_amount
        return self.amount


class Developer(Employee):
    raise_amount = 1.10
    def __init__(self,f,l,a,prog):
        super.__init__(f,l,a)
        self.programming=prog

class Manager(Employee):
    def __init__(self,f,l,a,emp=None):
        super.__init__(f,l,a)
        if emp is None:
            self.my_employee=[]
        else:
            self.my_employee=emp



    def add_employee(self,emp):
        if emp in self.my_employee:
            print("employee is already exist")
        else:
            self.my_employee.append(emp)

    def remove_employee(self,emp):
        if emp in self.my_employee:
            self.my_employee.remove(emp)

    def print_employee(self):
        for emp in self.my_employee:
            print (emp.fullnamme())



dev1=Developer("subhendu","panda",500000,"Python")
dev1.raise_amount()
dev2=Developer('Aditya','bishoyi',5688989,'java')
dev2.fullname()
dev1.fullname()
emp1=Employee("tonu","trip",30000)
emp1.raise_amount()
emp1.fullname()
mgr1=Manager("Biplab","choudhury",5000000)
mgr1.fullname()
mgr1.add_employee(dev1)
mgr1.add_employee(emp1)
mgr1.add_employee(dev2)
mgr1.print_employee()
mgr1.remove_employee(dev1)
mgr1.print_employee()

错误跟踪:

Traceback (most recent call last): 
File "C:/Users/Subhendu/PycharmProjects/hello/inheritance.py", line 56, in 
<module> dev1=Developer("subhendu","panda",500000,"Python") 
File "C:/Users/Subhendu/PycharmProjects/hello/inheritance.py", line 27, in
init super.__init__(f,l,a) TypeError: descriptor 'init' requires a 'super'
object but received a 'str'

Answer 1

将您所有的super.__init__(...)呼叫都更改为super().__init__(...)。问题是缺少一对括号()。

从此处的官方Python 3.3参考资料来看，super实际上是带有签名的内置函数super([type[, object-or-type]])。

Answer 2

你super在Developer课堂上给出错误的电话应该是:

super(Developer, self).__init__(f, l, a) 

在Manager课堂上:

super(Manager, self).__init__(f, l, a)

您还有其他问题,例如,Employee您有两个属性raise_amount,一个是a float,一个是方法(函数).这是不允许的float,优先,所以 dev1.raise_amount()失败.

在print_employee()你的错误拼写emp.fullname

Answer 3

def __init__(self,millage,cost,name,tyre,hp):
    super().__init__(millage,cost)
    self.name=name
    self.tyre=tyre
    self.hp=hp

super() 你忘了放 ()