#13019: longest_path broken for digraphs
----------------------------+-----------------------------------------------
Reporter: mhansen | Owner: jason, ncohen, rlm
Type: defect | Status: new
Priority: minor | Milestone: sage-5.1
Component: graph theory | Keywords:
Work issues: | Report Upstream: N/A
Reviewers: | Authors:
Merged in: | Dependencies:
Stopgaps: |
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{{{
sage: g = graphs.CompleteGraph(5).to_directed()
sage: g.longest_path(s=1,t=2)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
/home/mike/src/Imaging-1.1.7/<ipython-input-88-bddf7e1e9edc> in <module>()
----> 1 g.longest_path(s=Integer(1),t=Integer(2))
/opt/sage/local/lib/python2.6/site-packages/sage/graphs/generic_graph.pyc
in longest_path(self, s, t, use_edge_labels, algorithm, solver, verbose)
4772 (s is not None and (
4773 (s not in self) or
-> 4774 (self._directed and self.degree_out(s) == 0)
or
4775 (not self._directed and self.degree(s) == 0)))
or
4776 (t is not None and (
AttributeError: 'DiGraph' object has no attribute 'degree_out'
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13019>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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