chromatic_polynomial incorrectly blocks control-c

[williamstein]

Try this:

sage: graphs.CubeGraph(5).chromatic_polynomial()
[control-c]

control-c is ignored. Probably somebody doesn't understand _sig_on/_sig_off!

Component: combinatorics

Issue created by migration from https://trac.sagemath.org/ticket/3125

[rlmill]

comment:2

Attachment: trac3125-chrompoly_sig.patch.gz

After attached patch:

sage: graphs.CubeGraph(5).chromatic_polynomial()
^C---------------------------------------------------------------------------
<type 'exceptions.KeyboardInterrupt'>     Traceback (most recent call last)

/Users/rlmill/sage-3.0.1/<ipython console> in <module>()

/Users/rlmill/sage-3.0.1/local/lib/python/site-packages/sage/graphs/graph.py in chromatic_polynomial(self)
   7099         """
   7100         from sage.graphs.chrompoly import chromatic_polynomial
-> 7101         return chromatic_polynomial(self)
   7102 
   7103     def chromatic_number(self):

<type 'exceptions.KeyboardInterrupt'>: 

[sagetrac-mabshoff]

comment:4

Patch is good.

Cheers,

Michael

[sagetrac-mabshoff]

comment:5

Merged in Sage 3.0.2.alpha0