Hi,
I just opened a ticket on http://trac.sagemath.org/ticket/15821#ticket
Aladin
On Wednesday, February 12, 2014 6:50:01 PM UTC-8, Aladin VIRMAUX wrote:
>
> Hello everyone,
>
> here is a bug that is maybe related to coercion system to Integers in sage:
>
> sage: W = Words(4)
> sage: W([1,2])
> word: 12
> sage: W([1,2]) in QQ
> False
> sage: W([1,2]) in ZZ
> ---------------------------------------------------------------------------
> NotImplementedError Traceback (most recent call last)
> <ipython-input-30-ef733470b649> in <module>()
> ----> 1 W([Integer(1),Integer(2)]) in ZZ
> [...]
>
> NotImplementedError: please implement _an_element_ for Words over {1, 2,
> 3, 4}
>
> It is easy to fix by adding the _an_element_ method to W by doing:
>
> sage: W._an_element_ = lambda : W()
> sage: W([1,2]) in ZZ
> False
>
> but maybe is it hiding a more tricky problem behind ?
>
> Aladin
>
> PS: this post is in the continuity of a topic I originally opened on
> sage-support:
> https://groups.google.com/forum/#!topic/sage-support/uvKWkq7wDVM
>
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