#11370: permutation.to_standard() breaks on empty permutations
-----------------------------+----------------------------------------------
Reporter: hivert | Owner: sage-combinat
Type: defect | Status: new
Priority: major | Milestone: sage-4.7.1
Component: combinatorics | Keywords: Standard permutation
Work_issues: | Upstream: N/A
Reviewer: | Author: Florent Hivert
Merged: | Dependencies:
-----------------------------+----------------------------------------------
Description changed by hivert:
Old description:
> Yet another empty object problem
> {{{
> sage: sage.combinat.permutation.to_standard([])
> ---------------------------------------------------------------------------
> ValueError Traceback (most recent call
> last)
>
> /home/data/Sage-Install/sage-4.6.2/devel/sage-
> combinat/sage/combinat/<ipython console> in <module>()
>
> /home/florent/src/Sage/sage/local/lib/python2.6/site-
> packages/sage/combinat/permutation.pyc in to_standard(p)
> 4243
> 4244 s = p[:]
> -> 4245 biggest = max(p) + 1
> 4246 i = 1
> 4247 for _ in range(len(p)):
>
> ValueError: max() arg is an empty sequence
> }}}
> should be
> {{{
> []
> }}}
New description:
Yet another empty object problem
{{{
sage: sage.combinat.permutation.to_standard([])
---------------------------------------------------------------------------
ValueError Traceback (most recent call
last)
/home/data/Sage-Install/sage-4.6.2/devel/sage-
combinat/sage/combinat/<ipython console> in <module>()
/home/florent/src/Sage/sage/local/lib/python2.6/site-
packages/sage/combinat/permutation.pyc in to_standard(p)
4243
4244 s = p[:]
-> 4245 biggest = max(p) + 1
4246 i = 1
4247 for _ in range(len(p)):
ValueError: max() arg is an empty sequence
}}}
should be
{{{
[]
}}}
I also fixed the return type of {{{from_reduced_word([])}}.
--
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/11370#comment:1>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To post to this group, send email to [email protected].
To unsubscribe from this group, send email to
[email protected].
For more options, visit this group at
http://groups.google.com/group/sage-trac?hl=en.
