Primal heuristics

[th-yoon]

Does ecole support generating primal heuristic solutions from SCIP?

[gasse]

Coming soon :)

Edit: a bit more info, we are currently working on a new environment for learning to generate primal solutions. Developments are almost complete at this point, you can expect for it to be released in a few weeks.

[th-yoon]

Thanks for your reply. Then would it be possible to retrieve the internal feasible solutions from SCIP with current version of ecole?

[AntoinePrv]

You can use all the pyscipopt method on the Model using env.model.as_pyscipopt(). Not sure exactly how you get the solutions in PySCIPOpt though, but it should be feasible.

[gasse]

Yes, you have a few methods there that should do what you want:

https://github.com/scipopt/PySCIPOpt/blob/master/src/pyscipopt/scip.pyx#L4134

https://github.com/scipopt/PySCIPOpt/blob/master/src/pyscipopt/scip.pyx#L4147

https://github.com/scipopt/PySCIPOpt/blob/master/src/pyscipopt/scip.pyx#L4152

[th-yoon]

Awesome thanks!