Difference between class declarations

Question

I see some similar questions about this topic, but i wish to be sure, so i am asking...

What is the difference between:

class MyClass:
    pass
         


        

Answer 1

There is no difference between the first two spellings.

In python 2.7, there is a huge difference between the latter two. Inheriting from object makes it a new-style class, changing the inheritance semantics and adding support for descriptors (@property, @classmethod, etc.). It's the default in Python 3.

New-style classes were introduced in Python 2.2 to unify types (such as int and list), and classes, and because several things change in backwards-incompatible ways, you need to 'opt in', explicitly inherit from object to enable the changes.

In Python 3, inheriting from object is no longer needed, classes are new-style, always.