Rename features.constraints to constraints_old

miplearn/components/static_lazy.py

@@ -78,7 +78,7 @@ class StaticLazyConstraintsComponent(Component):
         assert solver.internal_solver is not None
         assert sample.after_load is not None
         assert sample.after_load.instance is not None
-        assert sample.after_load.constraints is not None
+        assert sample.after_load.constraints_old is not None
 
         logger.info("Predicting violated (static) lazy constraints...")
         if sample.after_load.instance.lazy_constraint_count == 0:
@@ -86,7 +86,7 @@ class StaticLazyConstraintsComponent(Component):
         self.enforced_cids = set(self.sample_predict(sample))
         logger.info("Moving lazy constraints to the pool...")
         self.pool = {}
-        for (cid, cdict) in sample.after_load.constraints.items():
+        for (cid, cdict) in sample.after_load.constraints_old.items():
             if cdict.lazy and cid not in self.enforced_cids:
                 self.pool[cid] = cdict
                 solver.internal_solver.remove_constraint(cid)
@@ -194,8 +194,8 @@ class StaticLazyConstraintsComponent(Component):
         y: Dict[Hashable, List[List[float]]] = {}
         cids: Dict[Hashable, List[str]] = {}
         assert sample.after_load is not None
-        assert sample.after_load.constraints is not None
-        for (cid, constr) in sample.after_load.constraints.items():
+        assert sample.after_load.constraints_old is not None
+        for (cid, constr) in sample.after_load.constraints_old.items():
             # Initialize categories
             if not constr.lazy:
                 continue
@@ -213,9 +213,9 @@ class StaticLazyConstraintsComponent(Component):
                 sf = sample.after_lp
             assert sf.instance is not None
             features = list(sf.instance.to_list())
-            assert sf.constraints is not None
-            assert sf.constraints[cid] is not None
-            features.extend(sf.constraints[cid].to_list())
+            assert sf.constraints_old is not None
+            assert sf.constraints_old[cid] is not None
+            features.extend(sf.constraints_old[cid].to_list())
             x[category].append(features)
             cids[category].append(cid)
 

miplearn/features.py

@@ -116,7 +116,7 @@ class Constraint:
 class Features:
     instance: Optional[InstanceFeatures] = None
     variables: Optional[VariableFeatures] = None
-    constraints: Optional[Dict[str, Constraint]] = None
+    constraints_old: Optional[Dict[str, Constraint]] = None
     lp_solve: Optional["LPSolveStats"] = None
     mip_solve: Optional["MIPSolveStats"] = None
     extra: Optional[Dict] = None
@@ -147,7 +147,7 @@ class FeaturesExtractor:
             with_static=with_static,
             with_sa=self.with_sa,
         )
-        features.constraints = solver.get_constraints(
+        features.constraints_old = solver.get_constraints(
             with_static=with_static,
         )
         if with_static:
@@ -201,9 +201,9 @@ class FeaturesExtractor:
         instance: "Instance",
         features: Features,
     ) -> None:
-        assert features.constraints is not None
+        assert features.constraints_old is not None
         has_static_lazy = instance.has_static_lazy_constraints()
-        for (cid, constr) in features.constraints.items():
+        for (cid, constr) in features.constraints_old.items():
             user_features = None
             category = instance.get_constraint_category(cid)
             if category is not None:
@@ -232,7 +232,7 @@ class FeaturesExtractor:
         instance: "Instance",
         features: Features,
     ) -> None:
-        assert features.constraints is not None
+        assert features.constraints_old is not None
         user_features = instance.get_instance_features()
         if isinstance(user_features, np.ndarray):
             user_features = user_features.tolist()
@@ -246,7 +246,7 @@ class FeaturesExtractor:
                 f"Found {type(v).__name__} instead."
             )
         lazy_count = 0
-        for (cid, cdict) in features.constraints.items():
+        for (cid, cdict) in features.constraints_old.items():
             if cdict.lazy:
                 lazy_count += 1
         features.instance = InstanceFeatures(

tests/components/test_static_lazy.py

@@ -32,7 +32,7 @@ def sample() -> Sample:
             instance=InstanceFeatures(
                 lazy_constraint_count=4,
             ),
-            constraints={
+            constraints_old={
                 "c1": Constraint(category="type-a", lazy=True),
                 "c2": Constraint(category="type-a", lazy=True),
                 "c3": Constraint(category="type-a", lazy=True),
@@ -42,7 +42,7 @@ def sample() -> Sample:
         ),
         after_lp=Features(
             instance=InstanceFeatures(),
-            constraints={
+            constraints_old={
                 "c1": Constraint(),
                 "c2": Constraint(),
                 "c3": Constraint(),
@@ -57,16 +57,16 @@ def sample() -> Sample:
         ),
     )
     sample.after_lp.instance.to_list = Mock(return_value=[5.0])  # type: ignore
-    sample.after_lp.constraints["c1"].to_list = Mock(  # type: ignore
+    sample.after_lp.constraints_old["c1"].to_list = Mock(  # type: ignore
         return_value=[1.0, 1.0]
     )
-    sample.after_lp.constraints["c2"].to_list = Mock(  # type: ignore
+    sample.after_lp.constraints_old["c2"].to_list = Mock(  # type: ignore
         return_value=[1.0, 2.0]
     )
-    sample.after_lp.constraints["c3"].to_list = Mock(  # type: ignore
+    sample.after_lp.constraints_old["c3"].to_list = Mock(  # type: ignore
         return_value=[1.0, 3.0]
     )
-    sample.after_lp.constraints["c4"].to_list = Mock(  # type: ignore
+    sample.after_lp.constraints_old["c4"].to_list = Mock(  # type: ignore
         return_value=[1.0, 4.0, 0.0]
     )
     return sample
@@ -115,7 +115,7 @@ def test_usage_with_solver(instance: Instance) -> None:
     stats: LearningSolveStats = {}
     sample = instance.samples[0]
     assert sample.after_load is not None
-    assert sample.after_load.constraints is not None
+    assert sample.after_load.constraints_old is not None
     assert sample.after_mip is not None
     assert sample.after_mip.extra is not None
     del sample.after_mip.extra["lazy_enforced"]
@@ -143,7 +143,7 @@ def test_usage_with_solver(instance: Instance) -> None:
 
     # Should ask internal solver to verify if constraints in the pool are
     # satisfied and add the ones that are not
-    c3 = sample.after_load.constraints["c3"]
+    c3 = sample.after_load.constraints_old["c3"]
     internal.is_constraint_satisfied.assert_called_once_with(c3, tol=1.0)
     internal.is_constraint_satisfied.reset_mock()
     internal.add_constraint.assert_called_once_with(c3, name="c3")

tests/test_features.py

@@ -27,7 +27,7 @@ def test_knapsack() -> None:
 
     features = FeaturesExtractor().extract(instance, solver)
     assert features.variables is not None
-    assert features.constraints is not None
+    assert features.constraints_old is not None
     assert features.instance is not None
 
     assert_equals(
@@ -65,7 +65,7 @@ def test_knapsack() -> None:
         ),
     )
     assert_equals(
-        _round_constraints(features.constraints),
+        _round_constraints(features.constraints_old),
         {
             "eq_capacity": Constraint(
                 basis_status="N",