Gurobi Python lower bound not printed

Answered

Nan D

June 06, 2023 07:17 Edited

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Hi!

I’m using Gurobi in combination with Python. My model contains several variables that have a lower bound of zero. I added these by using the lb=0 parameter to the addVars() method (although I know that this is unnecessary as the lb of 0 is default). When I use model.write() and inspect the bounds, the lower bounds of these variables are not printed. Is this a design choice of Gurobi as lower bounds of zero are default? Or is this a sign that something is wrong with my model?

Thank you!

kind regards

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  Elisabeth Rodríguez Heck

  • Gurobi Staff

  June 06, 2023 07:43

  Hi,

  This is expected behavior, the zero lower bounds of the variables are not printed because they are default.

  Best regards,

  Elisabeth

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  Nan D

  June 06, 2023 08:56

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  Hi, 

  Thank you for your quick reply. It’s clear!

  kind regards

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