Read on for the other failures. If you look up line 1953, you'll see it's
inside a try/except. You're triggering the KeyError, so it's the outer one
for you. That's the code that's trying to fill the cache, but it fails. The
rest of the traceback is of THAT error (it is saying "During handling of
the above exception, another exception occurred:" which refers to the fact
that you're in a try/except). There you get exactly the same error as for
"_representation_matrix_uncached", which is not caching at all.
In general, if you get a traceback of which you don't understand the first
few lines, read on a bit and/or look up some of the source code referenced.
It'll often give you a clue how to get a better understanding of what
failed. Python tracebacks contain lots of information. It takes a bit of
training to find something helpful in there (but it's often there!)
On Wednesday, 11 December 2024 at 11:58:22 UTC-8 jackson...@gmail.com wrote:
> Hi all,
>
> I am attempting to move some code from symmetric_group_algebra to
> symmetric_group_representations. We are constructing a unitary DFT for S_n
> over F_{q^2} and number fields, and an intermediate step was constructing
> unitary rep'ns. There's an alternate way to construct the unitary DFT which
> bypasses creating unitary rep'ns, but I think it makes sense to move the
> code to symmetric_group_representations.
>
> https://github.com/sagemath/sage/pull/38455
>
> I'd like to create a class called UnitaryRepresentation which extends
> SymmetricGroupRepresentation_generic_class which does two things:
>
> 1. returns the orthogonal rep'n in the characteristic zero case since
> these rep'ns are real, so they are also unitary
> 2. conjugates the 'specht' rep'n by the appropriate change-of-basis matrix
> A
>
> The tests are currently failing, and it seems to have something to do with
> caching. I'm not entire sure how this works, and just copied the format
> from SpechtRepresentation. It may even make more sense to extend one of
> these classes.
>
> Error: Failed example:: Exception raised:
>
> <https://github.com/sagemath/sage/actions/runs/12271264502/job/34237850309?pr=38455#step:16:102>Traceback
>
> (most recent call last):
>
> <https://github.com/sagemath/sage/actions/runs/12271264502/job/34237850309?pr=38455#step:16:103>
>
> File "sage/misc/cachefunc.pyx", line 1953, in
> sage.misc.cachefunc.CachedMethodCaller.__call__
>
> <https://github.com/sagemath/sage/actions/runs/12271264502/job/34237850309?pr=38455#step:16:104>
>
> return cache[k]
>
> <https://github.com/sagemath/sage/actions/runs/12271264502/job/34237850309?pr=38455#step:16:105>KeyError:
>
> (([3, 2, 1, 4],), ())
>
> Any help would be greatly appreciated.
>
> Thanks,
> Jackson
>
>
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