#!/bin/env python

# example using loadproblem to create a quadratically constrained
# quadratic problem.

import xpress as xp

p = xp.problem ()

# fill in a problem with three variables and four constraints

p.loadproblem ("",                 # probname
               ['G','G','L', 'L'], # qrtypes
               [-2.4, -3, 4, 5],   # rhs
               None,               # range
               [3,4,5],            # obj
               [0,2,4,8],          # mstart
               None,               # mnel
               [0,1,2,3,0,1,2,3],  # mrwind
               [1,1,1,1,1,1,1,1],  # dmatval
               [-1,-1,-1],         # lb
               [3,5,8],            # ub
               [0,0,0,1,1,2],      # mqobj1
               [0,1,2,1,2,2],      # mqobj1
               [2,1,1,2,1,2],      # dqe
               [2,3],              # qcrows
               [2,3],              # qcnquads
               [1,2,0,0,2],        # qcmqcol1
               [1,2,0,2,2],        # qcmqcol2
               [3,4,1,1,1])        # qcdqval

p.write ("loadedqc", "lp")
p.solve ()