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GAMS Python API - Tutorial and Examples File Reference

The Object-oriented API does not have the concept of a GAMS alias. More...

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def alias.gdxdump2 ()
def alias.gdxdump1 ()
def alias.get_data_text ()
def alias.same_gdx_dump (ws, gdxfile, expected_result)
def alias.my_assert (test, msg)
def alias.check_alias_logic (prefix, alias_db)

Variables = GamsWorkspace(system_directory = sys.argv[1])
 alias.j1 = ws.add_job_from_string(get_data_text())
 alias.db = ws.add_database(source_database= j1.out_db)
 alias.db2 = ws.add_database()
 alias.ii = db2.add_set_dc(db["ii"].name, ["*"], db["ii"].text)
 alias.aa_orig = db["aa"]
 alias.aa = db2.add_parameter_dc(db["aa"].name, [ii], db["aa"].text, )

Detailed Description

The Object-oriented API does not have the concept of a GAMS alias.

An alias cannot be entered into a GamsDatabase by API methods. Nevertheless, if the GamsDatabase is loaded from a GDX container (e.g. the GamsJob.out_db), the database can contain aliases. Such an alias can be retrieved as a GamsSet and consists of the elements of the aliased set. The method to find out if a GamsSet in a GamsDatabase is indeed an alias is to check if the symbol name is different from the lookup name (i.e. bool isAlias = db["ii"].name != "ii"). This example model goes through the logic of how aliases are handled in the Object-oriented API.

Definition in file