Make lazy constr component compatible with Pyomo+Gurobi

miplearn/problems/__init__.py

@@ -1,3 +1,28 @@
 #  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
 #  Copyright (C) 2020-2022, UChicago Argonne, LLC. All rights reserved.
 #  Released under the modified BSD license. See COPYING.md for more details.
+
+from typing import Any, Optional
+
+import gurobipy as gp
+from pyomo import environ as pe
+
+
+def _gurobipy_set_params(model: gp.Model, params: Optional[dict[str, Any]]) -> None:
+    assert isinstance(model, gp.Model)
+    if params is not None:
+        for (param_name, param_value) in params.items():
+            setattr(model.params, param_name, param_value)
+
+
+def _pyomo_set_params(
+    model: pe.ConcreteModel,
+    params: Optional[dict[str, Any]],
+    solver: str,
+) -> None:
+    assert (
+        solver == "gurobi_persistent"
+    ), "setting parameters is only supported with gurobi_persistent"
+    if solver == "gurobi_persistent" and params is not None:
+        for (param_name, param_value) in params.items():
+            model.solver.set_gurobi_param(param_name, param_value)