类型错误：描述符 '__init__' 需要一个 'super' 对象，但收到了一个 'str'

Question

使用 Python 3.X 作为解释器。 我刚刚继承了Employee类，其中有两个派生类是Developer和Manager 。

下面的代码抛出一个类型错误： '__init__' requires a 'super' object but received a 'str' 。
我不明白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

将所有super.__init__(...)调用更改为super().__init__(...) 。 问题是缺少一对括号() 。

从这里的官方 Python 3.3 参考来看， super实际上是一个带有签名super([type[, object-or-type]])的内置函数。

Answer 2

您在Developer类中给出错误的super调用应该是：

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

在Manager类中：

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

您还有其他问题，例如，在Employee有两个名为raise_amount属性，一个是float ，一个是方法（函数）。 这是不允许的， float优先，因此dev1.raise_amount()失败。

在print_employee()你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() 你忘记放 ()