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Questions about Gurobipy Versioning and License Compatibility

Answered
Yingkai Song
  • Gurobi-versary
  • Curious
  • First Comment

Hi there,

I’ve installed Gurobi on my computer using the official installer from the Gurobi website, and I’ve also installed gurobipy via Python. I have a few questions regarding versioning and licensing when both installations coexist:

  1. Is there a strict one-to-one mapping between the version of gurobipy and the version of the Gurobi optimizer it uses? For example, if I have gurobipy 12.0.0, does that mean it can only use Gurobi optimizer 12.0.0 (and not 11.0.0 or 12.0.2) when solving models through Python?
  2. Are the optimizer installed via the Gurobi website and the one bundled with gurobipy completely independent of each other? For instance, if I install version 12.0.0 from the website, can the Gurobi optimizer used in Python still be a different version, depending solely on the installed gurobipy version (assuming the answer to Question 1 is yes)?
  3. Do both the standalone Gurobi optimizer (from the website) and the Python-wrapped optimizer (gurobipy) use the same license file? In other words, can I use the same license from my Gurobi account for both?
  4. Is the Gurobi license backward compatible; for example, can a license for version 12.0 be used to run older versions such as 11.x or 10.x?

I would greatly appreciate your clarification on these points.

Best regards,
Yingkai
 

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Comments

1 comment

Date Votes
  • Riley Clement
    • Gurobi Staff

    Hi Yingkai,

    • Is there a strict one-to-one mapping between the version of gurobipy and the version of the Gurobi optimizer it uses? For example, if I have gurobipy 12.0.0, does that mean it can only use Gurobi optimizer 12.0.0 (and not 11.0.0 or 12.0.2) when solving models through Python?
    • Are the optimizer installed via the Gurobi website and the one bundled with gurobipy completely independent of each other? For instance, if I install version 12.0.0 from the website, can the Gurobi optimizer used in Python still be a different version, depending solely on the installed gurobipy version (assuming the answer to Question 1 is yes)?

    They are completely separate.  You can also have many different versions of gurobipy on your machine - you just have to use Python virtual environments.

    Do both the standalone Gurobi optimizer (from the website) and the Python-wrapped optimizer (gurobipy) use the same license file? In other words, can I use the same license from my Gurobi account for both?

    Yes, they can use the same license file.  No matter how Gurobi is run, it will look for a license file in the locations described in this article: https://support.gurobi.com/hc/en-us/articles/360013417211-Where-do-I-place-the-Gurobi-license-file-gurobi-lic

    Is the Gurobi license backward compatible; for example, can a license for version 12.0 be used to run older versions such as 11.x or 10.x?

    Yes, backwards compatible, but not forwards compatible.

    - Riley

     

     

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