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Model.cbSetSolution()
cbSetSolution ( vars, solution )
Import solution values for a heuristic solution. Only available when
the where value on the callback function is equal to
GRB.CB_MIPNODE. (see the Callback
Codes section for more information).
When you specify a heuristic solution from a callback, variables
initially take undefined values. You should use this method to
specify variable values. You can make multiple calls to
cbSetSolution from one callback invocation to specify values for
multiple sets of variables. After the callback, if values
have been specified for any variables, the Gurobi optimizer will try
to compute a feasible solution from the specified values, possibly
filling in values for variables whose values were left undefined.
You can also optionally call
cbUseSolution
within your callback function
to try to immediately compute a feasible solution from the specified
values.
Arguments:
vars: The variables whose values are being set. This can be a list of variables or a single variable.
solution: The desired values of the specified variables in the new solution.
Example usage:
def mycallback(model, where):
if where == GRB.Callback.MIPNODE:
model.cbSetSolution(vars, newsolution)
model.optimize(mycallback)
