Gurobi status code

Answered

Grégoire Boussac

• June 27, 2019 09:52
• Edited

Hi everyone,

I would like to know if there is a proper way to convert the integer status codes into strings ?
I'm using a handmade dictionary (in Python), but would like to know if there is a pre-built feature to do this.

Thank you!

1

• Official comment

  

  Kostja Siefen

  Gurobi Staff

  • June 28, 2019 08:54

  The full list of status codes is documented at https://www.gurobi.com/documentation/current/refman/optimization_status_codes.html. There is nothing wrong with writing your own dictionary to convert the code values to strings. The status codes are normally hardcoded during compilation and the values (e.g, OPTIMAL=2) will not be changed in the future. However, we have occasionally extended the list in the past with additional values for new major releases.

  The Gurobi Python API provides class constants that can also be used (GRB.OPTIMAL, etc.) so your dictionary definition could look like this:

  status = { "LOADED" : GRB.LOADED, "OPTIMAL" : GRB.OPTIMAL, .... }
• 

  Irvin Lustig

  • July 23, 2020 21:20
  • Edited

  

  

  You can hack this using the Python

  __dict__

  method:

  sc = gurobipy.StatusConstClass
  d = {sc.__dict__[k]: k for k in sc.__dict__.keys() if k[0] >= 'A' and k[0] <= 'Z'}

  Then the dictionary `d` is now:

  {1: 'LOADED',
   2: 'OPTIMAL',
   3: 'INFEASIBLE',
   4: 'INF_OR_UNBD',
   5: 'UNBOUNDED',
   6: 'CUTOFF',
   7: 'ITERATION_LIMIT',
   8: 'NODE_LIMIT',
   9: 'TIME_LIMIT',
   10: 'SOLUTION_LIMIT',
   11: 'INTERRUPTED',
   12: 'NUMERIC',
   13: 'SUBOPTIMAL',
   14: 'INPROGRESS',
   15: 'USER_OBJ_LIMIT'}

  2

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