[Help-glpk] [Fwd: Suppressing output]

[Andrew Makhorin]

-------- Forwarded Message --------
From: Páidí Creed <address@hidden>
To: address@hidden
Subject: Suppressing output
Date: Thu, 12 May 2011 13:44:38 +0100

Hi,


Is there any option to suppress output when using GLPK? I have a python
program that is using GLPK to solve a sequence of LPs, which causes
something like the following to be printed to my output. 


GLPSOL: GLPK LP/MIP Solver, v4.43
Parameter(s) specified in the command line:
 --cpxlp /tmp/3702-pulp.lp -o /tmp/3702-pulp.sol
Reading problem data from `/tmp/3702-pulp.lp'...
54 rows, 19 columns, 274 non-zeros
87 lines were read
GLPK Simplex Optimizer, v4.43
54 rows, 19 columns, 274 non-zeros
Preprocessing...
PROBLEM HAS NO PRIMAL FEASIBLE SOLUTION
If you need actual output for non-optimal solution, use --nopresol
Time used:   0.0 secs
Memory used: 0.1 Mb (68980 bytes)
Writing basic solution to `/tmp/3702-pulp.sol'...
GLPSOL: GLPK LP/MIP Solver, v4.43
Parameter(s) specified in the command line:
 --cpxlp /tmp/3702-pulp.lp -o /tmp/3702-pulp.sol
Reading problem data from `/tmp/3702-pulp.lp'...
54 rows, 19 columns, 274 non-zeros
87 lines were read
GLPK Simplex Optimizer, v4.43
54 rows, 19 columns, 274 non-zeros
Preprocessing...
PROBLEM HAS NO PRIMAL FEASIBLE SOLUTION
If you need actual output for non-optimal solution, use --nopresol
Time used:   0.0 secs
Memory used: 0.1 Mb (68980 bytes)
Writing basic solution to `/tmp/3702-pulp.sol'...
GLPSOL: GLPK LP/MIP Solver, v4.43
Parameter(s) specified in the command line:
 --cpxlp /tmp/3702-pulp.lp -o /tmp/3702-pulp.sol
Reading problem data from `/tmp/3702-pulp.lp'...
54 rows, 19 columns, 291 non-zeros
88 lines were read
GLPK Simplex Optimizer, v4.43
54 rows, 19 columns, 291 non-zeros
Preprocessing...
36 rows, 18 columns, 273 non-zeros
Scaling...
 A: min|aij| =  1.000e+00  max|aij| =  1.000e+00  ratio =  1.000e+00
Problem data seem to be well scaled
Constructing initial basis...
Size of triangular part = 36
      0: obj =   0.000000000e+00  infeas =  1.000e+00 (0)
     12: obj =   0.000000000e+00  infeas =  1.000e+00 (0)
PROBLEM HAS NO FEASIBLE SOLUTION
glp_simplex: unable to recover undefined or non-optimal solution
If you need actual output for non-optimal solution, use --nopresol
Time used:   0.0 secs
Memory used: 0.1 Mb (122109 bytes)
Writing basic solution to `/tmp/3702-pulp.sol'...
GLPSOL: GLPK LP/MIP Solver, v4.43
Parameter(s) specified in the command line:
 --cpxlp /tmp/3702-pulp.lp -o /tmp/3702-pulp.sol
Reading problem data from `/tmp/3702-pulp.lp'...
54 rows, 19 columns, 291 non-zeros
88 lines were read
GLPK Simplex Optimizer, v4.43
54 rows, 19 columns, 291 non-zeros
Preprocessing...
36 rows, 18 columns, 273 non-zeros
Scaling...
 A: min|aij| =  1.000e+00  max|aij| =  1.000e+00  ratio =  1.000e+00
Problem data seem to be well scaled
Constructing initial basis...
Size of triangular part = 36
      0: obj =   0.000000000e+00  infeas =  1.000e+00 (0)
      1: obj =   0.000000000e+00  infeas =  1.000e+00 (0)
PROBLEM HAS NO FEASIBLE SOLUTION
glp_simplex: unable to recover undefined or non-optimal solution
If you need actual output for non-optimal solution, use --nopresol
Time used:   0.0 secs
Memory used: 0.1 Mb (119349 bytes)
Writing basic solution to `/tmp/3702-pulp.sol'...
No separator of arity 3


However, I would rather only see the final line of output (which does
not come from GLPK): 


No separator of arity 3


Any help appreciated.


Regards,
Páidí