def solve_low_level(gams_folder, sim_folder, output_lst=False, logoption=3):
"""Use lower level apis to run GAMS. BAsed on GAMS xpexample2.py"""
from gamsxcc import new_gamsxHandle_tp, gamsxRunExecDLL, gamsxFree, gamsxCreateD, GMS_SSSIZE
from optcc import new_optHandle_tp, optReadDefinition, optSetStrStr, optSetIntStr, optHandleToPtr, optFree, \
optCreateD
sim_folder = force_str(sim_folder)
gams_folder = force_str(gams_folder)
model = os.path.join(sim_folder, 'UCM_h.gms')
def terminate(gamsxHandle, optHandle, rc):
optFree(optHandle)
gamsxFree(gamsxHandle)
os._exit(rc)
def callGams(gamsxHandle, optHandle, sysDir, model):
deffile = force_str(sysDir + u'/optgams.def')
if optReadDefinition(optHandle, deffile):
logging.error("*** Error ReadDefinition, cannot read def file:" +
deffile)
return False
optSetStrStr(optHandle, "SysDir", sysDir)
optSetStrStr(optHandle, "WorkDir", sim_folder)
optSetStrStr(optHandle, "Input", model)
optSetIntStr(optHandle, "LogOption", logoption)
ret = gamsxRunExecDLL(gamsxHandle, optHandleToPtr(optHandle), sysDir,
1)
if ret[0] != 0:
logging.error("*** Error RunExecDLL: Error in GAMS call = " +
str(ret[1]))
return False
return True
optHandle = new_optHandle_tp()
gamsxHandle = new_gamsxHandle_tp()
try:
rc = gamsxCreateD(gamsxHandle, gams_folder, GMS_SSSIZE)
rc = optCreateD(optHandle, gams_folder, GMS_SSSIZE)
time0 = time.time()
status = callGams(gamsxHandle, optHandle, gams_folder, model)
except Exception as e:
logging.error(
'The following error occured when trying to solve the model in gams: '
+ str(e))
sys.exit(1)
finally:
terminate(gamsxHandle, optHandle, 0)
logging.info('Completed simulation in {0:.2f} seconds'.format(time.time() -
time0))
return status
def solve_low_level(gams_folder, sim_folder, gams_file='UCM_h.gms', result_file='Results.gdx', output_lst=False, logoption=3):
"""Use lower level apis to run GAMS. Based on GAMS xpexample2.py.
We use the same signature as in solve_high_level for consistency when we call it.
As we define the working directory to be the simulation directory we do not need to define the output names
and move them around the filesystem"""
from gamsxcc import new_gamsxHandle_tp, gamsxRunExecDLL, gamsxFree, gamsxCreateD, GMS_SSSIZE
from optcc import new_optHandle_tp, optReadDefinition, optSetStrStr, optSetIntStr, optHandleToPtr, optFree, \
optCreateD
sim_folder = force_str(sim_folder)
gams_folder = force_str(gams_folder)
model = os.path.abspath(os.path.join(sim_folder, gams_file))
def callGams(gamsxHandle, optHandle, sysDir, model):
deffile = force_str(os.path.join(sysDir, 'optgams.def'))
if optReadDefinition(optHandle, deffile):
logging.error("*** Error ReadDefinition, cannot read def file:" + deffile)
return False
optSetStrStr(optHandle, "SysDir", sysDir)
optSetStrStr(optHandle, "WorkDir", sim_folder)
optSetStrStr(optHandle, "Input", model)
optSetIntStr(optHandle, "LogOption", logoption)
ret = gamsxRunExecDLL(gamsxHandle, optHandleToPtr(optHandle), sysDir, 1)
if ret[0] != 0:
logging.error("*** Error RunExecDLL: Error in GAMS call = " + str(ret[1]))
if 'White space' in str(ret[1]):
logging.error("The Unix GAMS API does not accept white spaces. Move dispaset to a folder that does not contain white spaces")
return False
return True
optHandle = new_optHandle_tp()
gamsxHandle = new_gamsxHandle_tp()
try:
__ = gamsxCreateD(gamsxHandle, gams_folder, GMS_SSSIZE)
__ = optCreateD(optHandle, gams_folder, GMS_SSSIZE)
time0 = time.time()
status = callGams(gamsxHandle, optHandle, gams_folder, model)
except Exception as e:
logging.error('The following error occured when trying to solve the model in gams: ' + str(e))
return False
finally:
optFree(optHandle)
gamsxFree(gamsxHandle)
logging.info('Completed simulation in {0:.2f} seconds'.format(time.time() - time0))
return status