apis/examples_python/simple__cutstock_8py_source.html

import sys

from cutstock_class import Cutstock

from gams import *


d = { "i1": 97, "i2": 610, "i3": 395, "i4": 211 }

w = { "i1": 47, "i2": 36, "i3": 31, "i4": 14 }

r = 100 #raw width


if __name__ == "__main__":

    if len(sys.argv) > 1:

        ws = GamsWorkspace(system_directory = sys.argv[1])

    else:

        ws = GamsWorkspace()


    cs = Cutstock(ws)

    cs.raw_width.add_record().value = r

    for i in d:

        cs.widths.add_record(i)

    for k,v in iter(d.items()):

        cs.demand.add_record(k).value = v

    for k,v in iter(w.items()):

        cs.width.add_record(k).value = v

    cs.opt.all_model_types = "cplex"


    try:

        cs.run(output=sys.stdout)

        for rep in cs.pat_rep:

            print(rep.key(0) + ", pattern " + rep.key(1) + ": " + str(rep.value))


    except GamsException as e:

        raise Exception("Problem in GAMS: " + str(e))

    except Exception as e:

        raise Exception("System Error: " + str(e))