diet3.py


#!/usr/bin/python

# Copyright 2018, Gurobi Optimization, LLC

# Use a SQLite database with the diet model (dietmodel.py).  The database
# (diet.db) can be recreated using the included SQL script (diet.sql).
#
# Note that this example reads an external data file (..\data\diet.db).
# As a result, it must be run from the Gurobi examples/python directory.

import os
import sqlite3
from gurobipy import *

con = sqlite3.connect(os.path.join('..', 'data', 'diet.db'))
cur = con.cursor()

cur.execute('select category,minnutrition,maxnutrition from categories')
result = cur.fetchall()
categories, minNutrition, maxNutrition = multidict(
    (cat,[minv,maxv]) for cat,minv,maxv in result)

cur.execute('select food,cost from foods')
result = cur.fetchall()
foods, cost = multidict(result)

cur.execute('select food,category,value from nutrition')
result = cur.fetchall()
nutritionValues = dict(((f,c),v) for f,c,v in result)

con.close()

import dietmodel
dietmodel.solve(categories, minNutrition, maxNutrition,
                foods, cost, nutritionValues)

Try Gurobi for Free

Choose the evaluation license that fits you best, and start working with our Expert Team for technical guidance and support.

Evaluation License
Get a free, full-featured license of the Gurobi Optimizer to experience the performance, support, benchmarking and tuning services we provide as part of our product offering.
Academic License
Gurobi supports the teaching and use of optimization within academic institutions. We offer free, full-featured copies of Gurobi for use in class, and for research.
Cloud Trial

Request free trial hours, so you can see how quickly and easily a model can be solved on the cloud.

Search