def addVariables(self, model):
"""
Add variables for MCKP problems
@ In, model, pyomo model instance, pyomo abstract model
@ Out, model, pyomo model instance, pyomo abstract model
"""
model = KnapsackBase.addVariables(self, model)
model.x = pyomo.Var(model.options, domain=pyomo.Binary)
return model
def addVariables(self, model):
"""
Add variables for SingleKnapsack problems
@ In, model, pyomo model instance, pyomo abstract model
@ Out, model, pyomo model instance, pyomo abstract model
"""
model = KnapsackBase.addVariables(self, model)
def boundsExpression(model, i):
""" set the bounds for soluion variable x using lowerBounds and upperBounds"""
return (self.lowerBounds[i], self.upperBounds[i])
model.x = pyomo.Var(model.investments,
domain=pyomo.NonNegativeIntegers,
bounds=boundsExpression)
return model
