Error gurobipy "__init__() got an unexpected keyword argument 'bounds'"

Awaiting user input

Joana Domingos

• September 26, 2022 11:13

Hi, when i try to run the code in Spyder, this is what it gives me:

I cannot understand the error since the code was running in Visual Studio Code

0

• 

  Jonasz Staszek

  Community Moderator

  • September 26, 2022 12:19

  

  

  

  Hi Joana,

  if you want to add a variable using Gurobi Python API, you need to use its syntax.

  Adding a single variable is usually done by the command model.addVar().

  If you use a different modelling package, you need to refer to its documentation.

  Best regards
  Jonasz

  0
• 

  Joana Domingos

  • September 26, 2022 12:58

  

  

  

  Hi! Thank you for your quick answer.
  However, i tried the model.addVar() and it gives me this:

  

  What should i do?

  0
• 

  Jonasz Staszek

  Community Moderator

  • September 26, 2022 13:23

  

  

  

  What is your \(model\) object? Is it a gurobipy model?

  It needs to be one, otherwise the method won't work or its behavior could be different to what we expect to see.

  Best regards
  Jonasz

  0
• 

  Joana Domingos

  • September 26, 2022 13:37

  

  

  

  My model object is defined as: 

  model = ConcreteModel()

   

  Is it a gurobipy model?

   

  Regards

  Joana

  0
• 

  Jonasz Staszek

  Community Moderator

  • September 26, 2022 14:05

  

  

  

  After a brief Google search I see that ConcreteModel() might be a pyomo-specific constructor.

  Are you using pyomo? If yes, I would redirect you to consult pyomo's documentation for further clarifications. Perhaps this section will be of interest.

  If that doesn't help, please share a minimal reproducible example of the code which throws this error.

  Best regards
  Jonasz

  0

Please sign in to leave a comment.