I am trying to solve this simple linear programming prob using MixedIntegerLinearProgram and it gives an AttributeError: LinearFunction instance has no attribute '__float__' exception
sage: p = MixedIntegerLinearProgram(maximization=True) sage: x = p.new_variable() sage: p.add_constraint(x[0] + x[1] , min=3) sage: p.add_constraint(20*x[0] + 10*x[1] , max=80) sage: p.add_constraint(x[1] , max=2*x[0]) sage: p.set_objective(2*x[0]+3*x[1]) p.show() Maximization: 2 x_0 +3 x_1 Constraints: 3 <= x_0 +x_1 20 x_0 +10 x_1 <= 80 x_1 <= 2 x_0 Variables: x_0 is a real variable (min=0.0, max=+oo) x_1 is a real variable (min=0.0, max=+oo) sage: p.solve() --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) /Hanoi/Storage.Hanoi/DL/<ipython console> in <module>() /home/tnguyen/Src/Devel/sage/local/lib/python2.6/site-packages/sage/ numerical/mip.so in sage.numerical.mip.MixedIntegerLinearProgram.solve (sage/numerical/mip.c:8036)() /home/tnguyen/Src/Devel/sage/local/lib/python2.6/site-packages/sage/ numerical/mip_glpk.so in sage.numerical.mip_glpk.solve_glpk (sage/ numerical/mip_glpk.cpp:725)() /home/tnguyen/Src/Devel/sage/local/lib/python2.6/site-packages/sage/ numerical/mip_glpk.so in sage.numerical.mip_glpk.build_glp_prob (sage/ numerical/mip_glpk.cpp:2272)() AttributeError: LinearFunction instance has no attribute '__float__' -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
