超级 python 2.7

super in python 2.7

我正在尝试了解如何在 python

中使用 super
class people:   
 name = ''  
 age = 0  
  __weight = 0  

 def __init__(self,n,a,w):  
    self.name = n  
    self.age = a  
    self.__weight = w  
def speak(self):  
    print("%s is speaking: I am %d years old" %(self.name,self.age))  


class student(people):  
 grade = ''  
 def __init__(self,n,a,w,g):  
    #people.__init__(self,n,a,w)  
    super(student,self).__init__(self,n,a,w)
    self.grade = g  

 def speak(self):  
    print("%s is speaking: I am %d years old,and I am in grade %d"%(self.name,self.age,self.grade))  


s = student('ken',20,60,3)  
s.speak()

以上代码出现以下错误:

---------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-147-9da355910141> in <module>()
     10 
     11 
---> 12 s = student('ken',20,60,3)
     13 s.speak()

<ipython-input-147-9da355910141> in __init__(self, n, a, w, g)
      3     def __init__(self,n,a,w,g):
      4         #people.__init__(self,n,a,w)
----> 5         super(student).__init__(self,n,a,w)
      6         self.grade = g
      7 

TypeError: must be type, not classobj

我很困惑为什么我不能在这种情况下使用 super(student,self).__init__(self,n,a,w),为什么我必须使用 people.__init__(self,n,a,w)

有什么帮助吗?

您的基础 class people 应该派生自 object class,使其成为新样式 class,这将允许 super() 上班。

然后您应该使用 super 作为:

super(student, self).__init__(n,a,w)

旧式 classes 的行为完全不同,我不理解它们