python - 如何禁用 PuLP 的计算日志

Question

我在Python中使用“pulp”和GUROBI来解决一些优化问题。例如GUROBI的计算日志为:

Optimize a model with 12 rows, 25 columns and 39 nonzeros
Coefficient statistics:
  Matrix range    [1e+00, 1e+00]
  Objective range [1e+00, 1e+00]
  Bounds range    [1e+00, 1e+00]
  RHS range       [1e+00, 1e+00]
Found heuristic solution: objective 12
Presolve removed 3 rows and 12 columns
Presolve time: 0.00s
Presolved: 9 rows, 13 columns, 27 nonzeros
Variable types: 0 continuous, 13 integer (13 binary)

Root relaxation: objective 7.000000e+00, 11 iterations, 0.00 seconds

    Nodes    |    Current Node    |     Objective Bounds      |     Work
 Expl Unexpl |  Obj  Depth IntInf | Incumbent    BestBd   Gap | It/Node Time

*    0     0               0       7.0000000    7.00000  0.00%     -    0s

Explored 0 nodes (11 simplex iterations) in 0.00 seconds
Thread count was 4 (of 4 available processors)

Optimal solution found (tolerance 1.00e-04)
Best objective 7.000000000000e+00, best bound 7.000000000000e+00, gap 0.0%
('Gurobi status=', 2)

我想禁用此输出，因为我要解决 800k 优化问题，并且在输出中写入这些日志会使我的代码太慢。有禁用这些日志的想法吗？

Answer 1

您需要显式声明一个求解器，因此替换此行

p.solve()

有了这个

p.solve(PULP_CBC_CMD(msg=0))

或将“PULP_CBC_CMD”替换为您正在使用的任何解算器。