Move python files to root folder; remove built docs

miplearn/solvers/tests/__init__.py

@@ -0,0 +1,26 @@
+#  MIPLearn: Extensible Framework for Learning-Enhanced Mixed-Integer Optimization
+#  Copyright (C) 2020, UChicago Argonne, LLC. All rights reserved.
+#  Released under the modified BSD license. See COPYING.md for more details.
+
+from miplearn import BasePyomoSolver, GurobiSolver, GurobiPyomoSolver, CplexPyomoSolver
+from miplearn.problems.knapsack import KnapsackInstance, GurobiKnapsackInstance
+
+
+def _get_instance(solver):
+    if issubclass(solver, BasePyomoSolver):
+        return KnapsackInstance(
+            weights=[23., 26., 20., 18.],
+            prices=[505., 352., 458., 220.],
+            capacity=67.,
+        )
+    if issubclass(solver, GurobiSolver):
+        return GurobiKnapsackInstance(
+            weights=[23., 26., 20., 18.],
+            prices=[505., 352., 458., 220.],
+            capacity=67.,
+        )
+    assert False
+
+
+def _get_internal_solvers():
+    return [GurobiPyomoSolver, CplexPyomoSolver, GurobiSolver]