Indicator constraints with arbitrary right-hand-side (Python)

Answered

Tobias Völk

May 26, 2022 17:22

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model.addGenConstrIndicator(...)

As far as I can see (though that does not mean much of course), there is no reason why the right-hand-side has to be a float. Neither Math nor Python should pose a problem here and it would make life easier for us users, because we could just write down constraints in the order in which we wrote them down on paper. May I therefore suggest adding this feature?

Best regards,

Tobi

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• Official comment

  

  Simranjit Kaur

  • Gurobi Staff

  November 16, 2025 23:36

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  Jaromił Najman

  • Gurobi Staff

  May 30, 2022 08:22 Edited

  Hi Tobi,

  Could you please elaborate more on what exactly the feature should be? A pseudo-code example or similar would be helpful.

  If you think about replacing the rhs argument to be, e.g., a TempConstr, then you might want to use the alternative or overloaded form

  # alternative form
  model.addGenConstrIndicator(x7, True, x1 + 2*x2 + x4 == 1.0 + x5)
  
  # overloaded form
  model.addConstr((x7 == 1) >> (x1 + 2*x2 + x4 == 1.0 + x5))

  Best regards, 
  Jaromił

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  Tobias Völk

  July 16, 2022 22:58

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  The alternative form is what I was looking for, thanks :)

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