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32 lines
1.0 KiB
32 lines
1.0 KiB
# MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
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# Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
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# Released under the modified BSD license. See COPYING.md for more details.
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from typing import TYPE_CHECKING, Dict
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from miplearn.types import ModelFeatures, ConstraintFeatures
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if TYPE_CHECKING:
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from miplearn import InternalSolver
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class ModelFeaturesExtractor:
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def __init__(
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self,
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internal_solver: "InternalSolver",
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) -> None:
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self.solver = internal_solver
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def extract(self) -> ModelFeatures:
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constraints: Dict[str, ConstraintFeatures] = {}
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for cid in self.solver.get_constraint_ids():
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constraints[cid] = {
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"RHS": self.solver.get_constraint_rhs(cid),
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"LHS": self.solver.get_constraint_lhs(cid),
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"Sense": self.solver.get_constraint_sense(cid),
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}
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return {
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"Constraints": constraints,
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"Variables": self.solver.get_empty_solution(),
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}
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