# Read TV4.lp  and change the objective funciton


# import the Gurobi tools
#
from gurobipy import *

######################

warmUp = read("TV4.lp")

warmUp.getVars()

for v in warmUp.getVars():
    print('%s ' % (v.varName))

a = warmUp.getVars()
a[0]
a[1]
a[2]

obj = LinExpr( -8 * a[0] + a[1] + 9 * a[2] )

warmUp.setObjective( obj, GRB.MAXIMIZE)

warmUp.optimize()
warmUp.printAttr("X")