Python differences in class definitions [duplicate]

Question

I know the following works but i never understood what the difference are between

class Animal:

class Animal():

class Animal(object):

Is this just a style difference or something more to it?

stackoverflow.com/questions/54867/…

MSeifert
– MSeifert

2016-02-07 21:41:03 +00:00
Commented Feb 7, 2016 at 21:41 — MSeifert
– MSeifert, Commented Feb 7, 2016 at 21:41

Asclepius · Accepted Answer · 2017-03-14 18:48:45Z

2

In Python 3, all three are the same, i.e. all derive from object.

edited Mar 14, 2017 at 18:48

Asclepius

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answered Feb 7, 2016 at 21:40

Clodion

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2 Comments

Ulf Aslak Over a year ago

Yes this is the case in Python 3, but (very importantly) this is NOT the case in Python 2, where omitting the inheritance of object creates an old-style class. As a rule of thumb, always make new-style classes in Python 2.

Clodion Over a year ago

@UlfAslak: yes sure! In Python 2 it was very important! As such python 3 if very nice!

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