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Add option to solve root relaxation only

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This commit is contained in:
Alinson S. Xavier
2020-02-23 12:21:55 -06:00
parent 15ee7f51ee
commit b428a4fc36
1 changed files with 8 additions and 1 deletions
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9
miplearn/solvers.py
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@@ -176,7 +176,12 @@ class LearningSolver:
solver.set_gap_tolerance(self.gap_tolerance) solver.set_gap_tolerance(self.gap_tolerance)
return solver return solver
def solve(self, instance, model=None, tee=False): def solve(self,
instance,
model=None,
tee=False,
relaxation_only=False,
):
if model is None: if model is None:
model = instance.to_model() model = instance.to_model()
@@ -187,6 +192,8 @@ class LearningSolver:
results = self.internal_solver.solve_lp(model, tee=tee) results = self.internal_solver.solve_lp(model, tee=tee)
instance.lp_solution = self.internal_solver.get_solution(model) instance.lp_solution = self.internal_solver.get_solution(model)
instance.lp_value = results["Optimal value"] instance.lp_value = results["Optimal value"]
if relaxation_only:
return results
# Invoke before_solve callbacks # Invoke before_solve callbacks
for component in self.components.values(): for component in self.components.values():