Python differences in class definitions

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?

http://stackoverflow.com/questions/54867/what-is-the-difference-between-old-style-and-new-style-classes-in-python — MSeifert, Feb 07 '16 at 21:41

score 2 · Answer 1 · edited Mar 14 '17 at 18:48

2

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

edited Mar 14 '17 at 18:48

Asclepius

answered Feb 07 '16 at 21:40

Clodion

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. – Ulf Aslak Feb 07 '16 at 21:53
@UlfAslak: yes sure! In `Python 2` it was very important! As such `python 3` if very nice! – Clodion Feb 07 '16 at 21:56

1 Answers1