Hi Bruce,
I think that what you have is fine. Compare with:
{{{
sage: mu=Partition([3,2])
sage: type(mu)
<class 'sage.combinat.partition.Partitions_all_with_category.element_class'>
}}}
If you try adding a method to `PathTableau`, such as with
{{{
class PathTableau(ClonableList):
@abstract_method(optional=False)
def check(self):
pass
def test(self):
print('a test')
}}}
then you will see that it is inherited:
{{{sage: c=CatalanTableau([0,1,2])
sage: c
[0, 1, 2]
sage: c.test()
}}}
On Wednesday, 13 June 2018 14:08:55 UTC+2, Bruce wrote:
>
> I am trying to implement an Abstract Base Class, but have hit something I
> don't understand.
>
> I have attached a file with a minimal example of what I am trying to do.
> There is an Element ABC PathTableau and a Parent ABC PathTableaux.
> I then inherit from these with Element CatalanTableau and Parent
> CatalanTableaux.
>
> PathTableau inherits from CloneableList so I want to do some preprocessing
> on the
> argument before creating the object. For this minimal example I have
> removed the
> methods in PathTableau.
>
> My problem is that when I run this I get:
>
> sage: c = CatalanTableau([0,1,0])
> sage: type(c)
> <class '__main__.CatalanTableaux.element_class'>
>
> This is not what I want. I want c to be an instance of CatalanTableau
> and therefore to inherit the (missing) methods from PathTableau.
>
> I suspect it will only take a minor adjustment to get what I want but I
> don't
> know what that would be.
>
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