This example shows the use of the GamsDatabase class for reading and writing GDX files. More...

Variables
sys	transport_gdx.sys_dir = sys.argv[1] if len(sys.argv) > 1 else None

GamsWorkspace	transport_gdx.ws = GamsWorkspace(system_directory=sys_dir)

list	transport_gdx.plants = ["Seattle", "San-Diego"]

list	transport_gdx.markets = ["New-York", "Chicago", "Topeka"]

dict	transport_gdx.capacity = {"Seattle": 350.0, "San-Diego": 600.0}

dict	transport_gdx.demand = {"New-York": 325.0, "Chicago": 300.0, "Topeka": 275.0}

dict	transport_gdx.distance

GamsWorkspace	transport_gdx.db = ws.add_database()

GamsWorkspace	transport_gdx.i = db.add_set("i", 1, "canning plants")

GamsWorkspace	transport_gdx.j = db.add_set("j", 1, "markets")

GamsWorkspace	transport_gdx.a = db.add_parameter_dc("a", [i], "capacity of plant i in cases")

	transport_gdx.value

GamsWorkspace	transport_gdx.b = db.add_parameter_dc("b", [j], "demand at market j in cases")

GamsWorkspace	transport_gdx.d = db.add_parameter_dc("d", [i, j], "distance in thousands of miles")

GamsWorkspace	transport_gdx.f = db.add_parameter("f", 0, "freight in dollars per case per thousand miles")

GamsWorkspace	transport_gdx.db2 = ws.add_database_from_gdx("data.gdx")

Detailed Description

This example shows the use of the GamsDatabase class for reading and writing GDX files.

In particular this example shows:

How to fill a GamsDatabase from Python data structures and export it to a GDX file
How to import a GDX file as a GamsDatabase

Definition in file transport_gdx.py.

Variables