#12351: AttributeError when ploting a poset
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Reporter: slabbe | Owner: sage-combinat
Type: defect | Status: needs_review
Priority: major | Milestone: sage-5.0
Component: combinatorics | Keywords: poset
Work_issues: | Upstream: N/A
Reviewer: | Author: Simon King
Merged: | Dependencies:
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Changes (by newvalueoldvalue):
* status: new => needs_review
* author: => Simon King
Comment:
The problem was in the comparison of poset elements. Comparing a poset
element with any object that has no parent (for example, comparison with a
Python int) resulted in an error.
I thought the straight forward way to fix it is: Use
`sage.structure.element.parent(bla)` instead of `bla.parent()`.
With the patch, plotting the Hasse diagram works, and the bug fix is
doctested. Needs review, then!
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12351#comment:1>
Sage <http://www.sagemath.org>
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