
From:  Seung Mo Gu 
Subject:  [Helpglpk] Configuring PuLP + GLPK 
Date:  Fri, 9 Apr 2010 11:01:47 +0400 
So I just installed PuLP but was unable to configure it with GLPK. Should it work naturally after both are installed? I #39;m currently running Python 2.6.5, PuLP 1.4.7, and GLPK 4.34. Could it be that the GLPK version is incompatible? I know PuLP requires Python 2.5 or higher. I tried running the sample code below in the python shell but nothing is printed. I #39;ve also included the pulp.pulpTestAll() output: from pulp import * prob = LpProblem("test1", LpMinimize) # Variables x = LpVariable("x", 0, 4) y = LpVariable("y", 1, 1) z = LpVariable("z", 0) # Objective prob += x + 4*y + 9*z # Constraints prob += x+y <= 5 prob += x+z >= 10 prob += y+z == 7 prob.solve(GLPK(msg = 0)) # Solution for v in prob.variables(): print v.name, "=", v.varValue print "objective=", value(prob.objective)  Solver pulp.solvers.CPLEX_DLL unavailable. Solver pulp.solvers.CPLEX_CMD unavailable. Solver pulp.solvers.COIN_CMD unavailable. Testing continuous LP solution Testing maximize continuous LP solution Testing unbounded continuous LP solution Error in CoinMP it reports Optimal Testing MIP solution Testing MIP relaxation Testing feasibility problem (no objective) Testing an infeasible problem Testing an integer infeasible problem Error in CoinMP to be fixed, reports Optimal Testing column based modelling Testing column based modelling with empty constraints Testing dual variables and slacks reporting Testing resolve of problem Testing Sequential Solves Testing fractional constraints Testing elastic constraints (no change) Testing elastic constraints (freebound) Testing elastic constraints (penalty unchanged) Testing elastic constraints (penalty unbounded) * Solver pulp.solvers.COINMP_DLL passed. Solver pulp.solvers.GLPK_CMD unavailable. Solver pulp.solvers.XPRESS unavailable. Solver pulp.solvers.GUROBI unavailable.So I just installed PuLP but was unable to configure it with GLPK. Should it work naturally after both are installed? I'm currently running Python 2.6.5, PuLP 1.4.7, and GLPK 4.34. Could it be that the GLPK version is incompatible? I know PuLP requires Python 2.5 or higher. I tried running the sample code below in the python shell but nothing is printed. I've also included the pulp.pulpTestAll() output:
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