python子类调用父类的变量_Python父类访问子类的类变量

I'm currently trying to implement some inheritance in my Python project and have hit a road block. I'm trying to create a baseParentClass that will handle the basic functionality for a lot of child classes. In this specific example I am trying to initialize an instance with a number of attributes (set to 0), stored as a class variable list (called ATTRS) in the Child. I am unsure of how to use this ATTRS in the parent class.

class Parent(object):

def __init__():

for attr in ATTRS:

setattr(self, attr, 0)

class Child(Parent):

#class variable

ATTRS = [attr1, attr2, attr3]

def __init__():

super(Child, self).__init__()

I could store ATTRS as self.ATTRS in Child, and then use self.ATTRS in Parent successfully, but it seems preferable to me to have them stored as a class variable.

Alternatively I could pass ATTRS as a parameter like so:

class Child(Parent):

#class variable

ATTRS = [attr1, attr2, attr3]

def __init__():

super(Child, self).__init__(ATTRS)

but I'm wondering whether this somehow defeats the point of using inheritance in the first place?

I'd be grateful for any ideas, hints or feedback whether I'm barking up the wrong tree completely!

Thanks

解决方案

You were close. This works:

class Parent(object):

def __init__(self):

for attr in self.ATTRS:

setattr(self, attr, 0)

class Child(Parent):

#class variable

ATTRS = ['attr1', 'attr2', 'attr3']

def __init__(self):

super(Child, self).__init__()

Here, you set the ATTRS list at the class level, and conveniently access it in self.ATTRS at baseclass's __init__.