[Tutor] Good approach regarding classes attributes

[Joel Goldstick]

On Tue, Sep 9, 2014 at 10:02 AM, Sydney Shall <s.shall at virginmedia.com> wrote:
> On 09/09/2014 15:44, Peter Otten wrote:
>
> Sydney Shall wrote:
>
> On 08/09/2014 18:39, Alan Gauld wrote:
>
> On 08/09/14 15:17, Juan Christian wrote:
>
> One tiny tweak...
>
> class User():
>
> You don't need the parens after User. You don;t have any superclasses
> so they do nothing. Python convention for an empty parent list is just
> to leave the parens off:
>
> class User:
>
> A simple question from a newbie, in response to this surprise.
> Is it not helpful to always put (object) as the parent, if the class is
> not itself a sub-class?
>
> The answer differs between Python 2 and 3. In Python 3
>
> class C: # preferred in Python 3
>     pass
>
> and
>
> class C(object):
>     pass
>
> are the same, so there is no point adding the explicit object inheritance.
>
> In Python 2 however
>
> class C:
>     pass
>
> will create a "classic class" whereas
>
> class C(object): # preferred in Python 2
>     pass
>
> is a "newstyle class". The most notable difference between these is that
> properties work correctly only with newstyle classes. Therefore making all
> your classes "newstyle" is a good idea.
>
> And while I am writing, what does OP stand for in this list?
>
> Original Poster, as Leam says.
>
>
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> Thanks Peter, most helpful.
> I was taught with Python 2.7, so  now I understand the advice.
>
>
> --
> Sydney Shall
>
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Joel Goldstick
http://joelgoldstick.com