[Tutor] Help with Multiple Inheritance in Classes

[Vusa Moyo]

Hi Alan.

You are correct with the indentation.

class Cat:
    name = ""
    kind = "cat"
    color = ""
    value = 100.00

    def description(self):
        desc_str = "%s is a %s %s cat worth R%.2f." % (self.name,
self.color, self.kind, self.value)
        return desc_str

The above code is the question, which I am not allowed to edit.

So just to test the lecturer's code, I run the command

print(Cat.description())

This returns an error.

>>>> TypeError: description() missing 1 required positional argument: 'self'

To me, this is flawed. I should be able to get a fault less response from
that command.

Any other code I append to it by inheriting the class Cat, will still  have
that similar error.

Now, I've added the following code to inherit the class Cat: description.

class Cat1(Cat):
    name = "Whiskers"
    kind = "Burmese cat"
    color = "grey"
    value = 3000.00

When I run this command, I still receive the same error.

print(Cat1.description())

Please assist where possible.

Regards

Vusa

On Wed, Feb 8, 2017 at 11:06 AM, Alan Gauld via Tutor <tutor at python.org>
wrote:

> On 08/02/17 07:11, Vusa Moyo wrote:
> > I have a suspicion my lecturer's question is flawed, so I'd like to pose
> it
> > to you guys to confirm my suspicions.
>
> I think your interpretation of the question is flawed.
> See Peter's reply for why.
>
> However another point is....
>
> >  class Cat:
> >      name = ""
> >      kind = "cat"
> >      color = ""
> >      value = 100.00
> >      def description(self):
> >
> > desc_str = "%s is a %s %s cat worth R%.2f." % (self.name, self.color,
> > self.kind, self.value)
>
> Python is sensitive to indentation. This line needs
> to be indented inside the def statement. (This may
> be a mail formatting issue but since the rest of
> your code looks OK I doubt it)
>
>
>
> --
> Alan G
> Author of the Learn to Program web site
> http://www.alan-g.me.uk/
> http://www.amazon.com/author/alan_gauld
> Follow my photo-blog on Flickr at:
> http://www.flickr.com/photos/alangauldphotos
>
>
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> To unsubscribe or change subscription options:
> https://mail.python.org/mailman/listinfo/tutor
>