def _apply_solver(self):
if not self._save_results:
for block in self._pyomo_model.block_data_objects(
descend_into=True, active=True):
for var in block.component_data_objects(
ctype=pyomo.core.base.var.Var,
descend_into=False,
active=True,
sort=False):
var.stale = True
if self._tee:
self._solver_model.setParam('OutputFlag', 1)
else:
self._solver_model.setParam('OutputFlag', 0)
self._solver_model.setParam('LogFile', self._log_file)
if self._keepfiles:
print("Solver log file: " + self._log_file)
# Options accepted by gurobi (case insensitive):
# ['Cutoff', 'IterationLimit', 'NodeLimit', 'SolutionLimit', 'TimeLimit',
# 'FeasibilityTol', 'IntFeasTol', 'MarkowitzTol', 'MIPGap', 'MIPGapAbs',
# 'OptimalityTol', 'PSDTol', 'Method', 'PerturbValue', 'ObjScale', 'ScaleFlag',
# 'SimplexPricing', 'Quad', 'NormAdjust', 'BarIterLimit', 'BarConvTol',
# 'BarCorrectors', 'BarOrder', 'Crossover', 'CrossoverBasis', 'BranchDir',
# 'Heuristics', 'MinRelNodes', 'MIPFocus', 'NodefileStart', 'NodefileDir',
# 'NodeMethod', 'PumpPasses', 'RINS', 'SolutionNumber', 'SubMIPNodes', 'Symmetry',
# 'VarBranch', 'Cuts', 'CutPasses', 'CliqueCuts', 'CoverCuts', 'CutAggPasses',
# 'FlowCoverCuts', 'FlowPathCuts', 'GomoryPasses', 'GUBCoverCuts', 'ImpliedCuts',
# 'MIPSepCuts', 'MIRCuts', 'NetworkCuts', 'SubMIPCuts', 'ZeroHalfCuts', 'ModKCuts',
# 'Aggregate', 'AggFill', 'PreDual', 'DisplayInterval', 'IISMethod', 'InfUnbdInfo',
# 'LogFile', 'PreCrush', 'PreDepRow', 'PreMIQPMethod', 'PrePasses', 'Presolve',
# 'ResultFile', 'ImproveStartTime', 'ImproveStartGap', 'Threads', 'Dummy', 'OutputFlag']
for key, option in self.options.items():
self._solver_model.setParam(key, option)
if self._version_major >= 5:
for suffix in self._suffixes:
if re.match(suffix, "dual"):
self._solver_model.setParam(
self._gurobipy.GRB.Param.QCPDual, 1)
self._solver_model.optimize()
self._solver_model.setParam('LogFile', 'default')
# FIXME: can we get a return code indicating if Gurobi had a significant failure?
return Bunch(rc=None, log=None)