[Tutor] a class query

[Mark Lawrence]

On 07/06/2010 17:03, python at bdurham.com wrote:
> Hi Mark,
>
>>> I was surprised to see class Name() work (in Python 2.6.5 at least). Is this equivalent to class Name( object ) or does this create an old style class? Going forward into the 2.7/3.x world, is there a preferred style?
>
>> RTFM? :)
>
> I am reading TFM :)
>
> Here's why I'm confused. The following paragraph from TFM seems to
> indicate that old style classes are the default:
>
> Quote: For compatibility reasons, classes are still old-style by
> default. New-style classes are created by specifying another new-style
> class (i.e. a type) as a parent class, or the “top-level type” object if
> no other parent is needed. The behaviour of new-style classes differs
> from that of old-style classes in a number of important details in
> addition to what type() returns. Some of these changes are fundamental
> to the new object model, like the way special methods are invoked.
> Others are “fixes” that could not be implemented before for
> compatibility concerns, like the method resolution order in case of
> multiple inheritance.
> http://docs.python.org/reference/datamodel.html#newstyle
>
> Yet TFM for 2.6.5 shows all class examples without specifying a parent
> class.
> http://docs.python.org/tutorial/classes.html
>
> I've been taught that the proper way to create new style classes has
> been to always specify an explicit "object" parent class when creating a
> new class not based on other classes.
>
> Somewhere along the line I seemed to have missed the fact that it is no
> longer necessary to define classes with 'object' as a parent in order to
> get a new style class.
>
> In other words, it seems that the following are now equivalent:
>
> class Name:
>
> -AND-
>
> class Name( object ):
>
> My impression was the "class Name:" style created an old style class.
>
> Thanks for your help!
>
> Malcolm
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Hi Malcolm,

I see that Stephen D'Aprano has already replied twice so I won't bother. 
  Apart from that no offence meant, I hope none taken.

Kindest regards.

Mark Lawrence.