ortools-clone/cmake/samples/python/sample.py

#!/usr/bin/env python3
# Copyright 2010-2024 Google LLC
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Sample to test or-tools installation."""
import ortools
# from ortools.algorithms import knapsack_solver
from ortools.constraint_solver import pywrapcp
# from ortools.graph.python import linear_sum_assignment
# from ortools.graph.python import max_flow
# from ortools.graph.python import min_cost_flow
from ortools.linear_solver import pywraplp
# from ortools.linear_solver import linear_solver_pb2
# from ortools.sat.python import swig_helper
# from ortools.sat.python import cp_model
# from ortools.scheduling import rcpsp
# from ortools.util.python import sorted_interval_list


def lpsolver_test():
  """Test pywraplp."""
  print('Test lpsolver...')
  lpsolver = pywraplp.Solver('LinearTest',
                             pywraplp.Solver.GLOP_LINEAR_PROGRAMMING)
  lpsolver.Solve()
  print('Test lpsolver...DONE')


def cpsolver_test():
  """Test pywrapcp."""
  print('Test cpsolver...')
  cpsolver = pywrapcp.Solver('ConstraintTest')
  num_vals = 3
  x = cpsolver.IntVar(0, num_vals - 1, 'x')
  y = cpsolver.IntVar(0, num_vals - 1, 'y')
  z = cpsolver.IntVar(0, num_vals - 1, 'z')
  cpsolver.Add(x != y)
  db = cpsolver.Phase([x, y, z], cpsolver.CHOOSE_FIRST_UNBOUND,
                      cpsolver.ASSIGN_MIN_VALUE)
  cpsolver.Solve(db)
  print('Test cpsolver...DONE')


def main():
  print(ortools.__version__)
  lpsolver_test()
  cpsolver_test()


if __name__ == '__main__':
  main()