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Python interface to Gurobi

Project description

The Gurobi Optimizer is a mathematical optimization software library for solving mixed-integer linear and quadratic optimization problems.

This package comes with a trial license that allows you to solve problems of limited size. As a student or staff member of an academic institution you qualify for a free, full product license. For more information, see:

For a commercial evaluation license, visit:

Other useful resources to get started:

A simple example

# Solve the following MIP:
#  maximize
#        x +   y + 2 z
#  subject to
#        x + 2 y + 3 z <= 4
#        x +   y       >= 1
#        x, y, z binary

import gurobipy as gp

# Create a new model
m = gp.Model()

# Create variables
x = m.addVar(vtype='B', name="x")
y = m.addVar(vtype='B', name="y")
z = m.addVar(vtype='B', name="z")

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

# Add constraints
m.addConstr(x + 2 * y + 3 * z <= 4)
m.addConstr(x + y >= 1)

# Solve it!
m.optimize()

print(f"Optimal objective value: {m.objVal}")
print(f"Solution values: x={x.X}, y={y.X}, z={z.X}")

Licensing information

GUROBI OPTIMIZATION, LLC END-USER LICENSE AGREEMENT (Evaluation License) (“Agreement”)

By downloading, installing, copying, accessing, clicking on an “accept” button or otherwise using the Product, You are accepting the terms of this Agreement. The Product will be enabled when You install the license key that is supplied to You by Gurobi or made available by Gurobi via ‘pip’. The “Effective Date” of this Agreement is the date on which the Product is enabled. The Product is copyrighted and licensed by Gurobi Optimization, LLC, a limited liability company, registered in Delaware (“Gurobi”).

THIS AGREEMENT IS A LEGAL CONTRACT BETWEEN YOU AND GUROBI. READ THE TERMS AND CONDITIONS OF THIS AGREEMENT CAREFULLY BEFORE INSTALLING OR OTHERWISE ACCESSING OR USING THE PRODUCT. THE PRODUCT IS COPYRIGHTED AND IT IS LICENSED TO YOU UNDER THIS AGREEMENT, NOT SOLD TO YOU. BY INSTALLING OR OTHERWISE ACCESSING OR USING THE PRODUCT, YOU ACKNOWLEDGE, REPRESENT AND WARRANT THAT YOU HAVE READ THIS AGREEMENT, THAT YOU UNDERSTAND IT, THAT YOU HAVE FULL POWER AND AUTHORITY TO BIND YOURSELF AS AN INDIVIDUAL AND THE BUSINESS ENTITY ON WHOSE BEHALF YOU ARE INSTALLING, ACCESSING OR USING THE PRODUCT, THAT YOU ACCEPT AND AGREE TO BE BOUND BY ITS TERMS, AND THAT, UPON INSTALLING OR OTHERWISE ACCESSING OR USING THE PRODUCT, THIS AGREEMENT WILL BECOME BECOME THE BINDING LEGAL OBLIGATION OF YOU (AS AN INDIVIDUAL AND THE BUSINESS ENTITY ON WHOSE BEHALF YOU ARE INSTALLING, ACCESSING OR USING THE PRODUCT). IF AT ANY TIME YOU ARE NOT WILLING TO BE BOUND BY THE TERMS OF THIS AGREEMENT, YOU SHOULD TERMINATE THE INSTALLATION PROCESS, IMMEDIATELY CEASE AND REFRAIN FROM ACCESSING OR USING THE PRODUCT AND DELETE ANY COPIES OF THE PRODUCT YOU MAY HAVE. TERMS AND CONDITIONS

  1. DEFINITIONS

1.1. “Product” means the limited, evaluation version of Gurobi Optimizer Version 9.0.0 or higher in the form of object code libraries, including all upgrades, new releases, modifications, enhancements, adaptations, copies and translations thereof. “You” and “Your” mean the individual who is installing, accessing or using the Product and the business entity on whose behalf such individual is installing, accessing or using the Product. Additional defined terms have the meaning ascribed to them in the body of this Agreement.

  1. SCOPE OF RIGHTS

2.1. Grant of License. Gurobi grants You a limited, non-exclusive, non-transferrable, non-sublicensable, revocable license during the term of this Agreement to install and operate the Product in machine-readable form solely in a non-production environment for internal evaluation of the suitability of the Product for Your legitimate business needs (“Product License”). You may make a reasonable number of copies of the Product in machine- readable, object code form, for nonproductive backup purposes only.

2.2. Limitations on Use. For the avoidance of doubt, the Product License does not grant You any right to use the Product in a live production environment (i.e. non-test environment). Except as expressly set forth in Section 2.1, You will not use, copy, modify, or distribute the Product, or make any copy, adaptation, transcription, or merge any portion thereof, unless expressly authorized by Gurobi in a separate written agreement signed by an authorized representative of Gurobi. You will not reverse assemble, reverse compile, translate, or reverse engineer the Product. Your Product License may not be sold, transferred, leased, assigned, or sub-licensed without Gurobi’s prior written consent. If You copy or modify the Product in any way not expressly authorized by Gurobi in writing, Your Product License is automatically terminated. You will not use the Product for the benefit of any third party including as part of any service bureau, time sharing or third party training arrangement. You will not publish any benchmark testing results on the Product. You will not use the Product in violation of any law, rules or regulation. The license granted to You in Section 2.1 is conditioned upon Your strict compliance with all restrictions and obligations in this Section 2.2.

  1. WARRANTIES; LIMITATION OF LIABILITY

3.1 Warranty Disclaimer. THE PRODUCT IS PROVIDED “AS IS,” AND GUROBI MAKES NO WARRANTIES, EXPRESS, IMPLIED, ARISING FROM COURSE OF DEALING OR USAGE OF TRADE, OR STATUTORY, AS TO THE PRODUCT, OR ANY MATTER WHATSOEVER. GUROBI DISCLAIMS ALL IMPLIED WARRANTIES, INCLUDING MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, SATISFACTORY QUALITY, TITLE AND NON-INFRINGEMENT. THE PRODUCT LICENSED HEREUNDER IS AN EVALUATION VERSION OF GUROBI’S STANDARD PRODUCT. ACCORDINGLY, THE PRODUCT WILL HAVE CONSTRAINTS AND LIMITATIONS THAT LIMIT THE SIZE OF THE OPTIMIZATION PROBLEM THE PRODUCT IS ABLE TO SOLVE. FOR THE AVOIDANCE OF DOUBT, GUROBI HAS NO OBLIGATION TO PROVIDE ANY MAINTENANCE AND SUPPORT SERVICES, OR ANY OTHER SERVICES, UNDER THIS AGREEMENT.

3.2 Limitation of Liability. GUROBI SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES (INCLUDING FOR LOSS OF PROFITS, SAVINGS, REVENUE, OR USE, DAMAGED OR LOST FILES OR DATA, OR BUSINESS INTERRUPTION) IN CONNECTION WITH THIS AGREEMENT OR THE PRODUCT, REGARDLESS OF THE CAUSE OF ACTION OR CHARACTERIZATION OF THE DAMAGES, EVEN IF GUROBI HAS BEEN ADVISED OF THE POSSIBILITY OF THESE DAMAGES. GUROBI WILL NOT BE LIABLE FOR ANY DAMAGES FOR THE COST OF PROCUREMENT OF SUBSTITUTE SOFTWARE, GOODS OR SERVICES, OR FOR ANY LIABILITY TO YOU RELATING TO THIS AGREEMENT, REGARDLESS OF THE CAUSE OF ACTION OR CHARACTERIZATION OF THE DAMAGES. YOU ACKNOWLEDGE THAT THE PROVISIONS FOR LIMITATION OF LIABILITY DESCRIBED IN THIS AGREEMENT FORM AN ESSENTIAL BASIS OF THE BARGAIN BETWEEN THE PARTIES AND THAT GUROBI WOULD NOT BE WILLING TO ENTER THIS AGREEMENT WITHOUT THEM. THEREFORE, YOU AGREE TO THIS ALLOCATION OF RISK AND HEREBY WAIVE ANY RIGHT, THROUGH EQUITABLE RELIEF OR OTHERWISE, TO SUBSEQUENTLY SEEK A MODIFICATION OF THESE PROVISIONS OR ALLOCATION OF RISK.

3.3 Disabling Device. THE PRODUCT MAY CONTAIN A DISABLING DEVICE THAT WILL PREVENT IT FROM BEING USED AFTER THE TERM OF THIS AGREEMENT ENDS. YOU AGREE NOT TO TAMPER WITH THE DISABLING DEVICE OR THE PRODUCT. YOU SHOULD TAKE PRECAUTIONS TO AVOID ANY LOSS OF DATA THAT MIGHT RESULT WHEN THE PRODUCT CAN NO LONGER BE USED.

  1. OWNERSHIP

4.1. Ownership. Gurobi shall have sole right, title, and interest in and to the Product and all documentation relating to the Product (including its development or its operation, testing or use, and all reports and copies created), and all intellectual property rights associated with the Product (including, without limitation, rights to copyrights, patents, trade secrets, and know-how). This Agreement does not provide You with title or ownership of the Product, but only a right of limited use pursuant to Section 2.1. If You are deemed to posses any rights in the Product, You hereby assign to Gurobi or all of such rights. To the extent Your rights are inalienable under applicable law, You hereby waive such rights in the Product and, if such waiver is deemed invalid, grant to Gurobi the exclusive, irrevocable, perpetual, worldwide, royalty free right to use, market, modify and grant licenses to the Product without identifying You or seeking Your consent.

  1. TERM AND TERMINATION

5.1. Term. Unless earlier terminated, this Agreement and Your Product License commences on the Effective Date and terminates on the expiration date set forth in the license file that is included with the Product. Either party may immediately terminate Your Product License and this Agreement by delivery of written notice of termination to the other party.

5.2. Effects of Termination. Upon the expiration or termination of this Agreement, (i) You shall immediately cease using the Product; (ii) You shall irretrievably destroy all copies of the Product in Your possession or control or return such copies to Gurobi the other Party, and (iii) You shall certify in writing to Gurobi that You have returned or destroyed such copies of the Product, with no copies retained.

5.3 Survival. Notwithstanding the expiration or termination of this Agreement for any reason, the rights and duties of the parties under Sections 2.2 (Limitations on Use), 3 (Warranties; Limitation of Liability), 4 (Ownership), 5.2 (Effects of Termination), 5.3 (Survival), 6 (Export Controls), and 7 (General) shall survive such expiration or termination and remain in full force and effect.

  1. EXPORT CONTROLS

6.1. Export Restrictions. The Product delivered to You under this Agreement is subject to U.S. export control laws and regulations and may also be subject to import and export laws of the jurisdiction in which it was obtained, if outside the U.S. You shall abide by all applicable export control laws, rules and regulations applicable to the Product and documentation. You agree that You will not export, re-export, or transfer the Product or documentation, in whole or in part, to any country, person, or entity subject to U.S. export restrictions. You specifically agree not to export, re- export, or transfer the Product or documentation (i) to any country to which the U.S. has embargoed or restricted the export of goods or services, or to any national of any such country, wherever located, who intends to transmit or transport the Product back to such country; (ii) to any person or entity who You know or have reason to know will utilize the Product or portion thereof in the design, development, production or use of nuclear, chemical or biological materials, facilities, or weapons; or (iii) to any person or entity who has been prohibited from participating in U.S. export transactions by any federal agency of the U.S. government.

  1. GENERAL

7.1. Assignment. This Agreement shall not be assignable by You without the prior written consent of Gurobi.

7.2. Waiver of Construction Against the Drafter. This Agreement shall be interpreted in accordance with the plain meaning of its terms and not strictly for or against either of the parties to this Agreement.

7.3. Severability. In the event that any provision of this Agreement is found invalid or unenforceable pursuant to judicial decree or decision, the remainder of this Agreement shall remain valid and enforceable according to its terms. WITHOUT LIMITING THE FOREGOING, IT IS EXPRESSLY UNDERSTOOD AND AGREED THAT, IN THE EVENT ANY REMEDY HEREUNDER IS DETERMINED TO HAVE FAILED OF ITS ESSENTIAL PURPOSE, ALL OTHER LIMITATIONS OF LIABILITY AND EXCLUSION OF DAMAGES SET FORTH HEREIN SHALL REMAIN IN FULL FORCE AND EFFECT.

7.4. Notices. All notices or other communications required to be given under this Agreement shall be in writing and delivered either personally, by a reputable overnight courier service (e.g., FedEx or UPS), or by U.S. mail, certified, return receipt requested, postage prepaid, and addressed as provided in this Agreement or as otherwise requested by the receiving party. Notices delivered personally shall be effective upon delivery and notices delivered by courier or U.S, mail shall be effective upon their receipt by the party to whom they are addressed.

7.5. Governing Law.

7.5.1 This Agreement shall be governed by, and construed and enforced in accordance with the laws of the State of California as they apply to a contract made and performed in such state and as if entered into by the residents of such state.

7.5.2 In all cases, the United Nations Convention on the International Sale of Goods shall not apply. The parties also agree that the provisions of the Uniform Computer Information Transactions Act shall not apply.

7.6. Modifications and Waivers. This Agreement may not be modified except by a writing signed by authorized representatives of both parties. A waiver by either party of its rights hereunder shall not be binding unless contained in a writing signed by an authorized representative of the party waiving its rights. The non-enforcement or waiver of any provision on one occasion shall not constitute a waiver of such provision on any other occasion unless expressly agreed in writing. The parties agree that no use of trade or other regular practice or method of dealing between the parties shall be used to modify, interpret, supplement, or alter in any manner the terms of this Agreement.

7.7. Arbitration. Any controversy or claim arising out of or relating to this Agreement, or the breach thereof that fails to settle by mediation, shall be settled by binding arbitration administered by JAMS in accordance with its then current Commercial Arbitration Rules, and judgment on the award rendered by the arbitrator may be entered in any court having jurisdiction thereof. The arbitrator may award monetary damages, injunctive relief, rescission, restitution, costs and attorneys’ fees. The arbitration award shall be final and binding regardless of whether one of the parties fails or refuses to participate in the arbitration. The arbitrator shall not have the power to amend this Agreement in any respect. Notwithstanding the foregoing, the parties agree that this Section 7.7 does not apply to the breach of provisions set forth in Section 2.2 (Limitations on Use) and Section 4 (Ownership), and that either party may petition a court of law for injunctive relief and such other rights and remedies as it may have at law or equity against breaches of these sections.

7.8. Attorneys’ Fees. In the event of any dispute with respect to this Agreement, the prevailing party shall be entitled to reasonable attorneys’ fees and other costs and expenses incurred in resolving such dispute.

Rev. October 2020 4810-9864-2638.2

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