#8553: Minor bugs in solve() if dictionary result requested
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Reporter: leif | Owner: leif
Type: defect | Status:
needs_work
Priority: trivial | Milestone:
sage-4.3.4
Component: symbolics | Keywords:
solve, solution_dict
Author: | Upstream: N/A
Reviewer: Harald Schilly, Mike Hansen, Burcin Erocal | Merged:
Work_issues: |
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Comment(by leif):
Replying to [comment:18 burcin]:
> AFAICT, `solve` returns a list of possible solutions to the given
equality. When the `solution_dict` parameter is `True`, this list is
populated by dictionaries instead of symbolic relations.
>
> With this reasoning the current behavior of returning an empty list if
we can't find any solutions even if the `solution_dict` parameter is
`True` seems correct to me.
That's really a matter of design; one could equally well specify the
function to return a list containing an empty dictionary in that case;
i.e., the current specification is not precise (and that's not the only
one).
But you're right, unless we change the ''informal'' "prototype" (its
signature), it should in any case return a '''''list''' of something''.
I'd change the patch to reflect whatever behavior you want... ;-)
-Leif
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/8553#comment:20>
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