gurobi example2.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Thu Apr  4 19:58:56 2019

@author: changlinli
"""

from gurobipy import *

try:

    # Create a new model
    m = Model("mip1")

    # Create variables
    x = m.addVar(vtype=GRB.BINARY, name="xx")
    y = m.addVar(vtype=GRB.BINARY, name="yy")
    z = m.addVar(vtype=GRB.BINARY, name="zz")

    # Set objective
    m.setObjective(x + y + 2 * z, GRB.MAXIMIZE)

    # Add constraint: x + 2 y + 3 z <= 4
    m.addConstr(x + 2 * y + 3 * z <= 4, "c0")

    # Add constraint: x + y >= 1
    m.addConstr(x + y >= 1, "c1")

    m.optimize()

    for v in m.getVars():
        print(v.varName, v.x)

    print('Obj:', m.objVal)

except GurobiError:
    print('Error reported')