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ConstraintFeatures: Store lhs and sense

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This commit is contained in:
Alinson S. Xavier
2021-03-02 18:14:07 -06:00
parent 3a60deac63
commit b6ea0c5f1b
6 changed files with 61 additions and 14 deletions
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9
miplearn/solvers/gurobi.py
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@@ -339,6 +339,15 @@ class GurobiSolver(InternalSolver):
assert self.model is not None
return self.model.getConstrByName(cid).rhs
def get_constraint_lhs(self, cid: str) -> Dict[str, float]:
assert self.model is not None
constr = self.model.getConstrByName(cid)
expr = self.model.getRow(constr)
lhs: Dict[str, float] = {}
for i in range(expr.size()):
lhs[expr.getVar(i).varName] = expr.getCoeff(i)
return lhs
def extract_constraint(self, cid):
self._raise_if_callback()
constr = self.model.getConstrByName(cid)