63 lines
2.0 KiB
Python
63 lines
2.0 KiB
Python
# Copyright 2010-2025 Google LLC
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Minimal solver python binary."""
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from collections.abc import Sequence
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from absl import app
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from absl import flags
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from ortools.linear_solver.python import model_builder
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_INPUT = flags.DEFINE_string("input", "", "Input file to load and solve.")
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_PARAMS = flags.DEFINE_string("params", "", "Solver parameters in string format.")
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_SOLVER = flags.DEFINE_string("solver", "sat", "Solver type to solve the model with.")
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def main(argv: Sequence[str]) -> None:
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"""Load a model and solves it."""
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if len(argv) > 1:
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raise app.UsageError("Too many command-line arguments.")
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model = model_builder.ModelBuilder()
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# Load MPS or proto file.
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if _INPUT.value.endswith(".mps"):
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if not model.import_from_mps_file(_INPUT.value):
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print(f"Cannot import MPS file: '{_INPUT.value}'")
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return
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elif not model.import_from_proto_file(_INPUT.value):
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print(f"Cannot import Proto file: '{_INPUT.value}'")
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return
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# Create solver.
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solver = model_builder.ModelSolver(_SOLVER.value)
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if not solver.solver_is_supported():
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print(f"Cannot create solver with name '{_SOLVER.value}'")
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return
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# Set parameters.
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if _PARAMS.value:
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solver.set_solver_specific_parameters(_PARAMS.value)
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# Enable the output of the solver.
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solver.enable_output(True)
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# And solve.
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solver.solve(model)
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if __name__ == "__main__":
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app.run(main)
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