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Make lazy constr component compatible with Pyomo+Gurobi

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This commit is contained in:
Alinson S. Xavier
2024-01-30 16:25:46 -06:00
parent c9eef36c4e
commit 25bbe20748
39 changed files with 482 additions and 264 deletions
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28
docs/guide/solvers.ipynb
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@@ -57,7 +57,7 @@
},
{
"cell_type": "code",
"execution_count": 3,
"execution_count": 1,
"id": "92b09b98",
"metadata": {
"collapsed": false,
@@ -70,10 +70,11 @@
"name": "stdout",
"output_type": "stream",
"text": [
"Gurobi Optimizer version 10.0.1 build v10.0.1rc0 (linux64)\n",
"Restricted license - for non-production use only - expires 2024-10-28\n",
"Gurobi Optimizer version 10.0.3 build v10.0.3rc0 (linux64)\n",
"\n",
"CPU model: AMD Ryzen 9 7950X 16-Core Processor, instruction set [SSE2|AVX|AVX2|AVX512]\n",
"Thread count: 16 physical cores, 32 logical processors, using up to 32 threads\n",
"CPU model: 13th Gen Intel(R) Core(TM) i7-13800H, instruction set [SSE2|AVX|AVX2]\n",
"Thread count: 10 physical cores, 20 logical processors, using up to 20 threads\n",
"\n",
"Optimize a model with 10 rows, 45 columns and 90 nonzeros\n",
"Model fingerprint: 0x6ddcd141\n",
@@ -91,11 +92,12 @@
"\n",
"Solved in 15 iterations and 0.00 seconds (0.00 work units)\n",
"Optimal objective 2.761000000e+03\n",
"Set parameter PreCrush to value 1\n",
"Set parameter LazyConstraints to value 1\n",
"Gurobi Optimizer version 10.0.1 build v10.0.1rc0 (linux64)\n",
"Gurobi Optimizer version 10.0.3 build v10.0.3rc0 (linux64)\n",
"\n",
"CPU model: AMD Ryzen 9 7950X 16-Core Processor, instruction set [SSE2|AVX|AVX2|AVX512]\n",
"Thread count: 16 physical cores, 32 logical processors, using up to 32 threads\n",
"CPU model: 13th Gen Intel(R) Core(TM) i7-13800H, instruction set [SSE2|AVX|AVX2]\n",
"Thread count: 10 physical cores, 20 logical processors, using up to 20 threads\n",
"\n",
"Optimize a model with 10 rows, 45 columns and 90 nonzeros\n",
"Model fingerprint: 0x74ca3d0a\n",
@@ -125,7 +127,7 @@
" Lazy constraints: 3\n",
"\n",
"Explored 1 nodes (16 simplex iterations) in 0.01 seconds (0.00 work units)\n",
"Thread count was 32 (of 32 available processors)\n",
"Thread count was 20 (of 20 available processors)\n",
"\n",
"Solution count 1: 2796 \n",
"\n",
@@ -141,7 +143,7 @@
"{'WS: Count': 1, 'WS: Number of variables set': 41.0}"
]
},
"execution_count": 3,
"execution_count": 1,
"metadata": {},
"output_type": "execute_result"
}
@@ -162,7 +164,7 @@
"from miplearn.io import write_pkl_gz\n",
"from miplearn.problems.tsp import (\n",
" TravelingSalesmanGenerator,\n",
" build_tsp_model,\n",
" build_tsp_model_gurobipy,\n",
")\n",
"from miplearn.solvers.learning import LearningSolver\n",
"\n",
@@ -189,7 +191,7 @@
"\n",
"# Collect training data\n",
"bc = BasicCollector()\n",
"bc.collect(train_data, build_tsp_model, n_jobs=4)\n",
"bc.collect(train_data, build_tsp_model_gurobipy, n_jobs=4)\n",
"\n",
"# Build learning solver\n",
"solver = LearningSolver(\n",
@@ -211,7 +213,7 @@
"solver.fit(train_data)\n",
"\n",
"# Solve a test instance\n",
"solver.optimize(test_data[0], build_tsp_model)"
"solver.optimize(test_data[0], build_tsp_model_gurobipy)"
]
},
{
@@ -239,7 +241,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.12"
"version": "3.11.7"
}
},
"nbformat": 4,