On 2/15/12 2:38 PM, Anne Schilling wrote:
> Hi Florent,
>
> Thanks for your answer.
>
>>> I pushed the first framework of the code (some methods are still missing),
>>> but I get some doc-test failures regarding categories which I am not sure
>>> how to fix.
>>> I think the problem is that the elements LinearExtensionsOfPoset are not in
>>> its parent,
>>> but I am not sure how to fix this.
>>
>> You have to implement a __contains__ method in LinearExtensionsOfPoset, which
>> is used to answer the question
>> x in LinearExtensionsOfPoset(...)
>
> Why? When I programmed core.py in sage/combinat we did not have to implement
> __contains__. And the code for LinearExtensionsOfPoset is very similar in
> structure
> to it.
Perhaps I need
__metaclass__ = ClasscallMetaclass
@staticmethod
def __classcall_private__(cls, p, order = None):
?
Cheers,
Anne
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