Times where one would use new style classes vs classic classes

[Quek]

Hi all,

I'm really new to Python and I've been reading up some texts on older
versions of Python (2.2 to be specific).

The text briefly mentioned new style and classic classes.

I'd really like to know in the current context of Python 2.5, besides
in the cases of multi-inheritance, where would I use new style
classes? Is it a norm to use more new style classes even if I don't
have multi-inheritance in the industry, open source projects, etc
today?

If this isn't the right place to ask these questions, could some one
point me somewhere more appropriate?

Thanks a lot.

[Daniel Fetchinson]

Re: Times where one would use new style classes vs classic classes

I'm really new to Python and I've been reading up some texts on older

versions of Python (2.2 to be specific).
>
The text briefly mentioned new style and classic classes.
>
I'd really like to know in the current context of Python 2.5, besides
in the cases of multi-inheritance, where would I use new style
classes? Is it a norm to use more new style classes even if I don't
have multi-inheritance in the industry, open source projects, etc
today?
>
If this isn't the right place to ask these questions, could some one
point me somewhere more appropriate?

As a general rule one always uses new style classes. In fact, in
python 3.0 old style classes will cease to exist which fact alone
justifies their abandonment from 2.x code too.

Cheers,
Daniel
--
Psss, psss, put it down! - http://www.cafepress.com/putitdown

[Ben Finney]

Re: Times where one would use new style classes vs classic classes

Quek <quekshuy@gmail .comwrites:

I'd really like to know in the current context of Python 2.5,
besides in the cases of multi-inheritance, where would I use new
style classes? Is it a norm to use more new style classes even if I
don't have multi-inheritance in the industry, open source projects,
etc today?

Yes, it's the norm to use new-style classes. This makes one's classes
part of the Python type hierarchy, allowing features such as 'super',
'property', etc. to work correctly.

Use new-style classes for any new code you create. Old-style classes
are deprecated in Python 2.5 (even earlier than that I believe), and
will be removed in Python 3.0
<URL:http://wiki.python.org/moin/Python3.0>.

--
\ “Good judgement comes from experience. Experience comes from |
`\ bad judgement.” —Frederick P. Brooks |
_o__) |
Ben Finney

[Bruno Desthuilliers]

Re: Times where one would use new style classes vs classic classes

Quek a écrit :

Hi all,
>
I'm really new to Python and I've been reading up some texts on older
versions of Python (2.2 to be specific).
>
The text briefly mentioned new style and classic classes.
>
I'd really like to know in the current context of Python 2.5, besides
in the cases of multi-inheritance, where would I use new style
classes?

Everywhere you don't have to support compat with ages-old versions of
Python. MI is not the main point of newstyle classes (FWIW, you can do
MI with old-style classes too), they have quite a lot more to offer.
Consider "classic" classes as a legacy feature, period.

[Quek]

Re: Times where one would use new style classes vs classic classes

On Jul 3, 3:11 pm, Bruno Desthuilliers <bruno.
42.desthuilli.. .@websiteburo.i nvalidwrote:

Quek a écrit :
>

Hi all,

>

I'm reallynewto Python and I've been reading up some texts on older
versions of Python (2.2 to be specific).

>

The text briefly mentionednewsty leand classic classes.

>

I'd really like to know in the current context of Python 2.5, besides
in the cases of multi-inheritance, where would I usenewstyle
classes?

>
Everywhere you don't have to support compat with ages-old versions of
Python. MI is not the main point of newstyle classes (FWIW, you can do
MI with old-styleclasses too), they have quite a lot more to offer.
Consider "classic" classes as a legacy feature, period.

Thanks everyone.