Model.cbGetSolution()


Model.cbGetSolution()

cbGetSolution ( vars )

Retrieve values from the new MIP solution. Note that this method can only be invoked when the where value on the callback function is equal to GRB.Callback.MIPSOL or GRB.Callback.MULTIOBJ (see the Callback Codes section for more information).

Arguments:

vars: The variables whose solution values are desired. Can be a variable, a matrix variable, a list of variables or matrix variables, or a dict of variables.

Return value:

Values for the specified variables in the solution. The format will depend on the input argument (a scalar, an ndarray, a list of values or ndarrays, or a dict).

Example usage:

  def mycallback(model, where):
    if where == GRB.Callback.MIPSOL:
      print(model.cbGetSolution(model._vars))

  model._vars = model.getVars()
  model.optimize(mycallback)