#12973: Cannot copy() instances of GurobiBackend.
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Reporter: e.vaughan |
Owner: jason, jkantor
Type: defect |
Status: new
Priority: minor |
Milestone: sage-5.0.1
Component: numerical |
Resolution:
Keywords: Gurobi, GurobiBackend, MixedIntegerLinearProgram | Work
issues:
Report Upstream: N/A |
Reviewers:
Authors: |
Merged in:
Dependencies: |
Stopgaps:
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Comment (by ncohen):
Wow !! Very good patch for a first ! `:-D`
Well, it did not apply cleanly on version 5.1.beta0 but that was to be
expected if you worked on 4.8 Actually, the replacement from GUROBI to
Gurobi has been done since, and that was the whole reason why it did not
apply. I just rebased your patch on 5.1.beta0 and updated it on the trac
ticket.
There is a problem though, for your patch does not *compile*. When I apply
it and type "sage -b" I get this :
{{{
Error compiling Cython file:
------------------------------------------------------------
...
sage: p.set_objective([2, 5])
# optional - Gurobi
sage: p.write_lp(SAGE_TMP+"/lp_problem.lp")
# optional - Gurobi
"""
check(self.env, GRBwrite(self.model[0], filename))
cpdef GurobiBackend copy(self):
^
------------------------------------------------------------
sage/numerical/backends/gurobi_backend.pyx:1079:10: C method 'copy' not
previously declared in definition part of extension type
Error running command, failed with status 256.
Error installing modified sage library code.
}}}
This is because cdef methods should be added to gurobi_backend.pxd as it
is added for glpk in glpk_backend.pxd. I will post another patch to do
exactly that.
Nathann
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/12973#comment:3>
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