How to extend init method with inheritance

Question

I have the following code, in which I am trying to extend the init method of BaseExporter:

from apps.ingest.platform_export import BaseExporter

class Vudu(BaseExporter):

    def __init__(self):
        BaseExporter.__init__()
        self.platform = ' Vudu'

Basically, I would like all of the init'd variables from the BaseExporter plus the additional variable of self.platform = 'Vudu'. How would I do this correctly?

http://stackoverflow.com/questions/576169/understanding-python-super-with-init-methods — Dušan Maďar, Jun 02 '15 at 20:29

Dušan Maďar · Answer 1 · 2021-01-19T07:52:14.413

8

Python 3

from apps.ingest.platform_export import BaseExporter

class Vudu(BaseExporter):
    def __init__(self):
        super().__init__()
        self.platform = ' Vudu'

Python 2

from apps.ingest.platform_export import BaseExporter

class Vudu(BaseExporter):
    def __init__(self):
        super(Vudu, self).__init__()
        self.platform = ' Vudu'

edited Jan 19 '21 at 07:52

answered Jun 02 '15 at 20:31

Dušan Maďar

9,269
5
49
64

If I'm not wrong, this is the old way to do things. – projetmbc Jun 02 '15 at 20:41
7

Or just `super().__init__()` if the OP is using python3 – Padraic Cunningham Jun 02 '15 at 20:41

score 5 · Accepted Answer · answered Jun 02 '15 at 20:29

5

You were on the right track, only missing self on the parent class

from apps.ingest.platform_export import BaseExporter

class Vudu(BaseExporter):

    def __init__(self):
        BaseExporter.__init__(self)
        self.platform = ' Vudu'

answered Jun 02 '15 at 20:29

Fran Lupión

134
10

2

I believe using super is "more" correct - as the code will work even if the classes are refactored for multiple inheritance for instance. – Tony Suffolk 66 Jun 02 '15 at 20:35
I prefer to use the parent for each __init__ because it could have more than one argument even more with multiple inheritance – Fran Lupión Jun 02 '15 at 20:44
1

in which case you should use variable argument lists. Using super ensures that the Inheritance tree is always executed in the correct way. – Tony Suffolk 66 Jun 02 '15 at 20:54

How to extend init method with inheritance

2 Answers2