Messages being printed to standard output when library is loaded

Answered

Carlos Martin

• June 13, 2020 04:51

Currently,

Using license file /Users/[username]/gurobi.lic
Academic license - for non-commercial use only

is printed to standard output every time I run a Python script that uses Gurobi (e.g. when executing a batch of such scripts sequentially). Is it possible to disable one or both of these messages through some environment flag?

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• 

  Eli Towle

  Gurobi Staff

  • June 17, 2020 18:47

  Hi Carlos,

  You could set the OutputFlag parameter before the Gurobi environment is even started. E.g.:

  import gurobipy as gp
  
  with gp.Env(empty=True) as env:
      env.setParam('OutputFlag', 0)
      env.start()
      with gp.Model(env=env) as m:
          # Build model m here
  

  Does this work for you?

  Eli

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• 

  Carlos Martin

  • June 17, 2020 20:20
  • Edited

  

  

  

  Eli Towle Thanks, that seems to work. Is there a way to change the default for OutputFlag globally (e.g. through some system-wide environment variable or setting)?

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• 

  Eli Towle

  Gurobi Staff

  • June 17, 2020 22:43
  • Edited

  Hi Carlos,

  There's no way to change OutputFlag on a system level.

  An alternative approach (that may better fit your usage) is to create a \( \texttt{gurobi.env} \) file (see here) in the current working directory of your scripts, and add to that file the single line

  OutputFlag 0

  Gurobi will automatically look for a \( \texttt{gurobi.env} \) file to use in the current working directory. If it finds one, it applies the listed parameters to new Gurobi environments. So, if you have such a \( \texttt{gurobi.env} \) file in the same directory as your scripts, your scripts don't need to create a special environment:

  import gurobipy as gp
  
  with gp.Model() as m:
      # Build model m here
  

  Thanks,

  Eli

  0

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