miplearn module: export extractors

miplearn/__init__.py

@@ -8,4 +8,5 @@ from .instance import Instance
 from .solvers import LearningSolver
 from .benchmark import BenchmarkRunner
 from .warmstart import WarmStartComponent, KnnWarmStartPredictor, LogisticWarmStartPredictor
-from .branching import BranchPriorityComponent
+from .branching import BranchPriorityComponent
+from .extractors import UserFeaturesExtractor, SolutionExtractor