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simple_knapsack_program

<table align="left"> <td> <a href="https://colab.research.google.com/github/google/or-tools/blob/main/examples/notebook/algorithms/simple_knapsack_program.ipynb">Run in Google Colab</a> </td> <td> <a href="https://github.com/google/or-tools/blob/main/ortools/algorithms/samples/simple_knapsack_program.py">View source on GitHub</a> </td> </table>

First, you must install ortools package in this colab.

python

%pip install ortools

A simple knapsack problem.

python

from ortools.algorithms.python import knapsack_solver



def main():
    # Create the solver.
    solver = knapsack_solver.KnapsackSolver(
        knapsack_solver.SolverType.KNAPSACK_DYNAMIC_PROGRAMMING_SOLVER,
        "test",
    )

    weights = [
        # fmt:off
      [565, 406, 194, 130, 435, 367, 230, 315, 393, 125, 670, 892, 600, 293, 712, 147, 421, 255],
        # fmt:on
    ]
    capacities = [850]
    values = weights[0]

    solver.init(values, weights, capacities)
    computed_value = solver.solve()

    packed_items = [
        x for x in range(0, len(weights[0])) if solver.best_solution_contains(x)
    ]
    packed_weights = [weights[0][i] for i in packed_items]

    print("Packed items: ", packed_items)
    print("Packed weights: ", packed_weights)
    print("Total weight (same as total value): ", computed_value)


main()