Inheriting from Python list object(type?)

[Mangabasi]

On May 23, 2:24 pm, Lyosha <lyos... at gmail.com> wrote:
> On May 23, 12:19 pm, Lyosha <lyos... at gmail.com> wrote:
>
>
>
> > On May 23, 12:07 pm, Mangabasi <mangab... at gmail.com> wrote:
>
> > > On May 23, 1:43 pm, "Jerry Hill" <malaclyp... at gmail.com> wrote:
>
> > > > On 23 May 2007 11:31:56 -0700, Mangabasi <mangab... at gmail.com> wrote:
>
> > > > > When I modified this to:
>
> > > > > class Point(list):
> > > > >     def __init__(self,x,y):
> > > > >         super(Point, self).__init__([x, y])
> > > > >         self.x = x
> > > > >         self.y = y
>
> > > > > It worked.
>
> > > > Are you sure?
>
> > > > >>> p = Point(10, 20)
> > > > >>> p
> > > > [10, 20]
> > > > >>> p.x
> > > > 10
> > > > >>> p.x = 15
> > > > >>> p
> > > > [10, 20]
> > > > >>> p[0]
> > > > 10
> > > > >>> p.x
> > > > 15
>
> > > > That doesn't look like what you were asking for in the original post.
> > > > I'm afraid I don't know anything about numpy arrays or what special
> > > > attributes an object may need to be put into a numpy array though.
>
> > > > --
> > > > Jerry
>
> > > This is the winner:
>
> > > class Point(list):
> > >     def __init__(self, x, y, z = 1):
> > >         super(Point, self).__init__([x, y, z])
> > >         self.x = x
> > >         self.y = y
> > >         self.z = z
>
> > [...]
>
> >http://docs.python.org/dev/whatsnew/node3.htmlannouncesnamed tuples
> > in python2.6.  This is not what you want since tuples are immutable,
> > but you might get some inspiration from their implementation.  Or
> > maybe not.
>
> Dude, google groups suck!  They say "an error has occurred" and the
> message is happily posted.

Tell me about it!  :)