Using timeout with pulp interface

[Melvin Saab]

I am using pulp to solve an ILP problem, and I am using the default CBC solver. My code sets up the variables, constraints, and object in an LpProblem, myProb. Then I call myProb.solve(). How do I set a time limit to the solve call (because the problem I am trying to solve is large)? Also, I am interested in the best solution achieved when the time limit is exceeded. Is this possible?

Thanks.

[Franco Peschiera]

Hey Melvin,

You just need to add the following argument in the call: maxSeconds.

I usually use the following call:




model.solve(pulp.PULP_CBC_CMD(maxSeconds=1000, msg=1, fracGap=0))

which controls the maximum time (in seconds), the level of messaging (to see the progress CBC makes) and the max GAP you desire to have (another stop condition in addition to maxSeconds).

regards,

Franco