def __init__(self, gams_dir=None, lazy_load=True):
"""
Initializes a GdxFile object by connecting to GAMS and creating a pointer.
Throws a GdxError if either of those operations fail.
"""
self.lazy_load = lazy_load
self._version = None
self._producer = None
self._filename = None
self._symbols = OrderedDict()
NeedsGamsDir.__init__(self, gams_dir=gams_dir)
self._H = self._create_gdx_object()
self.universal_set = GdxSymbol('*',
GamsDataType.Set,
dims=1,
file=None,
index=0)
self.universal_set._file = self
# get special values
self.special_values = gdxcc.doubleArray(gdxcc.GMS_SVIDX_MAX)
gdxcc.gdxGetSpecialValues(self.H, self.special_values)
self.gdx_to_np_svs = {}
self.np_to_gdx_svs = {}
for i in range(gdxcc.GMS_SVIDX_MAX):
if i >= len(NUMPY_SPECIAL_VALUES):
break
gdx_val = self.special_values[i]
self.gdx_to_np_svs[gdx_val] = NUMPY_SPECIAL_VALUES[i]
self.np_to_gdx_svs[i] = gdx_val
atexit.register(self.cleanup)
return
def load_specials(gams_dir_finder):
"""
Load special values
Needs to be called after gdxcc is loaded. Populates the module attributes
SPECIAL_VALUES, GDX_TO_NP_SVS, and NP_TO_GDX_SVS.
Parameters
----------
gams_dir_finder : :class:`gdxpds.tools.GamsDirFinder`
"""
global SPECIAL_VALUES
global GDX_TO_NP_SVS
global NP_TO_GDX_SVS
H = gdxcc.new_gdxHandle_tp()
rc = gdxcc.gdxCreateD(H, gams_dir_finder.gams_dir, gdxcc.GMS_SSSIZE)
if not rc:
raise Exception(rc[1])
# get special values
special_values = gdxcc.doubleArray(gdxcc.GMS_SVIDX_MAX)
gdxcc.gdxGetSpecialValues(H, special_values)
SPECIAL_VALUES = []
GDX_TO_NP_SVS = {}
NP_TO_GDX_SVS = {}
for i in range(gdxcc.GMS_SVIDX_MAX):
if i >= len(NUMPY_SPECIAL_VALUES):
break
SPECIAL_VALUES.append(special_values[i])
gdx_val = special_values[i]
GDX_TO_NP_SVS[gdx_val] = NUMPY_SPECIAL_VALUES[i]
NP_TO_GDX_SVS[NUMPY_SPECIAL_VALUES[i]] = gdx_val
gdxcc.gdxFree(H)
