def run(args=None):
###################################
# to import plugins
import pyomo.environ
import pyomo.solvers.plugins.smanager.phpyro
def LagrangeMorePR(args=None):
print("lagrangeMorePR begins %s" % datetime_string())
blanks = " " # used for formatting print statements
class Object(object): pass
Result = Object()
# options used
betaTol = options.beta_tol # tolerance used to separate b-values
IndVarName = options.indicator_var_name
multName = options.lambda_parm_name
CCStageNum = options.stage_num
MaxMorePR = options.max_number # max PR points to be generated (above F^* with all delta fixed)
MaxTime = options.max_time # max time before terminate
csvPrefix = options.csvPrefix # input filename prefix (eg, case name)
probFileName = options.probFileName # name of file containing probabilities
##HG override
# options.verbosity = 2
verbosity = options.verbosity
Result.status = 'starting '+datetime_string()
STARTTIME = time.time()
ph = PHFromScratch(options)
rootnode = ph._scenario_tree._stages[0]._tree_nodes[0] # use rootnode to loop over scenarios
if find_active_objective(ph._scenario_tree._scenarios[0]._instance,safety_checks=True).is_minimizing():
print("We are solving a MINIMIZATION problem.")
else:
print("We are solving a MAXIMIZATION problem.")
# initialize
ScenarioList = []
with open(csvPrefix+"ScenarioList.csv",'r') as inputFile:
for line in inputFile.readlines():
L = line.split(',')
ScenarioList.append([L[0],float(L[1])])
addstatus = str(len(ScenarioList))+' scenarios read from file: ' + csvPrefix+'ScenarioList.csv'
if verbosity > 0: print(addstatus)
Result.status = Result.status + '\n' + addstatus
PRoptimal = []
with open(csvPrefix+"PRoptimal.csv",'r') as inputFile:
for line in inputFile.readlines():
bzS = line.split(',')
PRoptimal.append( [None, float(bzS[0]), float(bzS[1])] )
addstatus = str(len(PRoptimal))+' PR points read from file: '+ csvPrefix+'PRoptimal.csv (envelope function)'
if verbosity > 0:
print(addstatus)
Result.status = Result.status + '\n' + addstatus
# ensure PR points on envelope function are sorted by probability
PRoptimal.sort(key=operator.itemgetter(1))
PRoptimal[0][0] = 0 # initial lambda (for b=0)
for p in range(1,len(PRoptimal)):
dz = PRoptimal[p][2] - PRoptimal[p-1][2]
db = PRoptimal[p][1] - PRoptimal[p-1][1]
PRoptimal[p][0] = dz/db
if verbosity > 0:
PrintPRpoints(PRoptimal)
Result.PRoptimal = PRoptimal
lambdaval = 0.
lagrUtil.Set_ParmValue(ph, options.lambda_parm_name,lambdaval)
# IMPORTANT: Preprocess the scenario instances
# before fixing variables, otherwise they
# will be preprocessed out of the expressions
# and the output_fixed_variable_bounds option
# will have no effect when we update the
# fixed variable values (and then assume we
# do not need to preprocess again because
# of this option).
ph._preprocess_scenario_instances()
## read scenarios to select for each PR point on envelope function
with open(csvPrefix+"OptimalSelections.csv",'r') as inputFile:
OptimalSelections = []
for line in inputFile.readlines():
if len(line) == 0: break # eof
selections = line.split(',')
L = len(selections)
Ls = len(selections[L-1])
selections[L-1] = selections[L-1][0:Ls-1]
if verbosity > 1:
print(str(selections))
OptimalSelections.append(selections)
Result.OptimalSelections = OptimalSelections
addstatus = str(len(OptimalSelections)) + ' Optimal selections read from file: ' \
+ csvPrefix + 'OptimalSelections.csv'
Result.status = Result.status + '\n' + addstatus
if len(OptimalSelections) == len(PRoptimal):
if verbosity > 0:
print(addstatus)
else:
addstatus = addstatus + '\n** Number of selections not equal to number of PR points'
print(addstatus)
Result.status = Result.status + '\n' + addstatus
print(str(OptimalSelections))
print((PRoptimal))
return Result
#####################################################################################
# get probabilities
if probFileName is None:
# ...generate from widest gap regions
PRlist = FindPRpoints(options, PRoptimal)
else:
# ...read probabilities
probList = []
with open(probFileName,'r') as inputFile:
if verbosity > 0:
print("reading from probList = "+probFileName)
for line in inputFile.readlines(): # 1 probability per line
if len(line) == 0:
break
prob = float(line)
probList.append(prob)
if verbosity > 0:
print("\t "+str(len(probList))+" probabilities")
if verbosity > 1:
print(str(probList))
PRlist = GetPoints(options, PRoptimal, probList)
if verbosity > 1:
print("PRlist:")
for interval in PRlist:
print(str(interval))
# We now have PRlist = [[i, b], ...], where b is in PRoptimal interval (i-1,i)
addstatus = str(len(PRlist)) + ' probabilities'
if verbosity > 0:
print(addstatus)
Result.status = Result.status + '\n' + addstatus
#####################################################################################
lapsedTime = time.time() - STARTTIME
addstatus = 'Initialize complete...lapsed time = ' + str(lapsedTime)
if verbosity > 1:
print(addstatus)
Result.status = Result.status + '\n' + addstatus
#####################################################################################
if verbosity > 1:
print("\nlooping over Intervals to generate PR points by flipping heuristic")
Result.morePR = []
for interval in PRlist:
lapsedTime = time.time() - STARTTIME
if lapsedTime > MaxTime:
addstatus = '** lapsed time = ' + str(lapsedTime) + ' > max time = ' + str(MaxTime)
if verbosity > 0: print(addstatus)
Result.status = Result.status + '\n' + addstatus
break
i = interval[0] # = PR point index
b = interval[1] # = target probability to reach by flipping from upper endpoint
bU = PRoptimal[i][1] # = upper endpoint
bL = PRoptimal[i-1][1] # = lower endpoint
if verbosity > 1:
print( "target probability = "+str(b)+" < bU = PRoptimal[" + str(i) + "][1]" \
" and > bL = PRoptimal["+str(i-1)+"][1]")
if b < bL or b > bU:
addstatus = '** probability = '+str(b) + ', not in gap interval: (' \
+ str(bL) + ', ' + str(bU) + ')'
print(addstatus)
print(str(PRoptimal))
print(str(PRlist))
Result.status = Result.status + '\n' + addstatus
return Result
if verbosity > 1:
print( "i = "+str(i)+" : Starting with bU = "+str(bU)+" having "+ \
str(len(OptimalSelections[i]))+ " selections:")
print(str(OptimalSelections[i]))
# first fix all scenarios = 0
for sname, sprob in ScenarioList:
scenario = ph._scenario_tree.get_scenario(sname)
lagrUtil.FixIndicatorVariableOneScenario(ph,
scenario,
IndVarName,
0)
# now fix optimal selections = 1
for sname in OptimalSelections[i]:
scenario = ph._scenario_tree.get_scenario(sname)
lagrUtil.FixIndicatorVariableOneScenario(ph,
scenario,
IndVarName,
1)
# flip scenario selections from bU until we reach b (target probability)
bNew = bU
for sname, sprob in ScenarioList:
scenario = ph._scenario_tree.get_scenario(sname)
if bNew - sprob < b:
continue
instance = ph._instances[sname]
if getattr(instance, IndVarName).value == 0:
continue
bNew = bNew - sprob
# flipped scenario selection
lagrUtil.FixIndicatorVariableOneScenario(ph,
scenario,
IndVarName,
0)
if verbosity > 1:
print("\tflipped "+sname+" with prob = "+str(sprob)+" ...bNew = "+str(bNew))
if verbosity > 1:
print("\tflipped selections reach "+str(bNew)+" >= target = "+str(b)+" (bL = "+str(bL)+")")
if bNew <= bL + betaTol or bNew >= bU - betaTol:
if verbosity > 0:
print("\tNot generating PR point...flipping from bU failed")
continue # to next interval in list
# ready to solve to get cost for fixed scenario selections associated with probability = bNew
if verbosity > 1:
# check that scenarios are fixed as they should be
totalprob = 0.
for scenario in ScenarioList:
sname = scenario[0]
sprob = scenario[1]
instance = ph._instances[sname]
print("fix "+sname+" = "+str(getattr(instance,IndVarName).value)+\
" is "+str(getattr(instance,IndVarName).fixed)+" probability = "+str(sprob))
if getattr(instance,IndVarName).value == 1:
totalprob = totalprob + sprob
lambdaval = getattr(instance, multName).value
print("\ttotal probability = %f" % totalprob)
# solve (all delta fixed); lambda=0, so z = Lagrangian
if verbosity > 0:
print("solve begins %s" % datetime_string())
print("\t- lambda = %f" % lambdaval)
SolStat, z = lagrUtil.solve_ph_code(ph, options)
b = Compute_ExpectationforVariable(ph, IndVarName, CCStageNum)
if verbosity > 0:
print("solve ends %s" % datetime_string())
print("\t- SolStat = %s" % str(SolStat))
print("\t- b = %s" % str(b))
print("\t- z = %s" % str(z))
print("(adding to more PR points)")
Result.morePR.append([None,b,z])
if verbosity > 1:
PrintPRpoints(Result.morePR)
######################################################
# end loop over target probabilities
with open(csvPrefix+"PRmore.csv",'w') as outFile:
for point in Result.morePR:
outFile.write(str(point[1])+','+str(point[2]))
addstatus = str(len(Result.morePR)) + ' PR points written to file: '+ csvPrefix + 'PRmore.csv'
if verbosity > 0: print(addstatus)
Result.status = Result.status + '\n' + addstatus
addstatus = 'lapsed time = ' + putcommas(time.time() - STARTTIME)
if verbosity > 0: print(addstatus)
Result.status = Result.status + '\n' + addstatus
return Result
################################
# LagrangeMorePR ends here
################################
#### start run ####
AllInOne = False
# VERYSTARTTIME=time.time()
# print "##############VERYSTARTTIME:",str(VERYSTARTTIME-VERYSTARTTIME)
##########################
# options defined here
##########################
try:
conf_options_parser = construct_ph_options_parser("lagrange [options]")
conf_options_parser.add_argument("--beta-min",
help="The min beta level for the chance constraint. Default is None",
action="store",
dest="beta_min",
type=float,
default=None)
conf_options_parser.add_argument("--beta-max",
help="The beta level for the chance constraint. Default is None",
action="store",
dest="beta_max",
type=float,
default=None)
conf_options_parser.add_argument("--min-prob",
help="Tolerance for testing probability > 0. Default is 1e-5",
action="store",
dest="min_prob",
type=float,
default=1e-5)
conf_options_parser.add_argument("--beta-tol",
help="Tolerance for testing equality to beta. Default is 10^-2",
action="store",
dest="beta_tol",
type=float,
default=1e-2)
conf_options_parser.add_argument("--Lagrange-gap",
help="The (relative) Lagrangian gap acceptable for the chance constraint. Default is 10^-4.",
action="store",
type=float,
dest="Lagrange_gap",
default=0.0001)
conf_options_parser.add_argument("--max-number",
help="The max number of PR points. Default = 10.",
action="store",
dest="max_number",
type=int,
default=10)
conf_options_parser.add_argument("--max-time",
help="Maximum time (seconds). Default is 3600.",
action="store",
dest="max_time",
type=float,
default=3600)
conf_options_parser.add_argument("--csvPrefix",
help="Input file name prefix. Default is ''",
action="store",
dest="csvPrefix",
type=str,
default="")
conf_options_parser.add_argument("--lambda-parm-name",
help="The name of the lambda parameter in the model. Default is lambdaMult",
action="store",
dest="lambda_parm_name",
type=str,
default="lambdaMult")
conf_options_parser.add_argument("--indicator-var-name",
help="The name of the indicator variable for the chance constraint. The default is delta",
action="store",
dest="indicator_var_name",
type=str,
default="delta")
conf_options_parser.add_argument("--stage-num",
help="The stage number of the CC indicator variable (number, not name). Default is 2",
action="store",
dest="stage_num",
type=int,
default=2)
conf_options_parser.add_argument("--verbosity",
help="verbosity=0 is no extra output, =1 is medium, =2 is debug, =3 super-debug. Default is 1.",
action="store",
dest="verbosity",
type=int,
default=1)
conf_options_parser.add_argument("--prob-file",
help="file name specifiying probabilities",
action="store",
dest="probFileName",
type=str,
default=None)
# The following needed for solve_ph_code in lagrangeutils
conf_options_parser.add_argument("--solve-with-ph",
help="Perform solves via PH rather than an EF solve. Default is False",
action="store_true",
dest="solve_with_ph",
default=False)
################################################################
options = conf_options_parser.parse_args(args=args)
# temporary hack
options._ef_options = conf_options_parser._ef_options
options._ef_options.import_argparse(options)
except SystemExit as _exc:
# the parser throws a system exit if "-h" is specified - catch
# it to exit gracefully.
return _exc.code
if options.verbose is True:
print("Loading reference model and scenario tree")
scenario_instance_factory = \
ScenarioTreeInstanceFactory(options.model_directory,
options.instance_directory)
full_scenario_tree = \
GenerateScenarioTreeForPH(options,
scenario_instance_factory)
solver_manager = SolverManagerFactory(options.solver_manager_type)
if solver_manager is None:
raise ValueError("Failed to create solver manager of "
"type="+options.solver_manager_type+
" specified in call to PH constructor")
if isinstance(solver_manager,
pyomo.solvers.plugins.smanager.phpyro.SolverManager_PHPyro):
solver_manager.deactivate()
raise ValueError("PHPyro can not be used as the solver manager")
try:
if (scenario_instance_factory is None) or (full_scenario_tree is None):
raise RuntimeError("***ERROR: Failed to initialize the model and/or scenario tree data.")
# load_model gets called again, so lets make sure unarchived directories are used
options.model_directory = scenario_instance_factory._model_filename
options.instance_directory = scenario_instance_factory._scenario_tree_filename
scenario_count = len(full_scenario_tree._stages[-1]._tree_nodes)
# create ph objects for finding the solution. we do this even if
# we're solving the extensive form
if options.verbose is True:
print("Loading scenario instances and initializing scenario tree for full problem.")
########## Here is where multiplier search is called ############
Result = LagrangeMorePR()
#####################################################################################
finally:
solver_manager.deactivate()
# delete temporary unarchived directories
scenario_instance_factory.close()
print("\n==================== returned from LagrangeMorePR")
print(str(Result.status))
try:
print("Envelope:")
print(str(PrintPRpoints(Result.PRoptimal)))
print("\nAdded:")
PrintPRpoints(Result.morePR)
except:
print("from run: PrintPRpoints failed")
sys.exit()
# combine tables and sort by probability
if len(Result.morePR) > 0:
PRpoints = copy.deepcopy(Result.PRoptimal)
for lbz in Result.morePR: PRpoints.append(lbz)
print("Combined table of PR points (sorted):")
PRpoints.sort(key=operator.itemgetter(1))
print(str(PrintPRpoints(PRpoints)))
def run(args=None):
###################################
# to import plugins
import pyomo.environ
import pyomo.solvers.plugins.smanager.phpyro
def LagrangeMorePR(args=None):
print("lagrangeMorePR begins %s" % datetime_string())
blanks = " " # used for formatting print statements
class Object(object): pass
Result = Object()
# options used
betaTol = options.beta_tol # tolerance used to separate b-values
IndVarName = options.indicator_var_name
multName = options.lambda_parm_name
CCStageNum = options.stage_num
MaxMorePR = options.max_number # max PR points to be generated (above F^* with all delta fixed)
MaxTime = options.max_time # max time before terminate
csvPrefix = options.csvPrefix # input filename prefix (eg, case name)
probFileName = options.probFileName # name of file containing probabilities
##HG override
# options.verbosity = 2
verbosity = options.verbosity
Result.status = 'starting '+datetime_string()
STARTTIME = time.time()
ph = PHFromScratch(options)
rootnode = ph._scenario_tree._stages[0]._tree_nodes[0] # use rootnode to loop over scenarios
if find_active_objective(ph._scenario_tree._scenarios[0]._instance,safety_checks=True).is_minimizing():
print("We are solving a MINIMIZATION problem.")
else:
print("We are solving a MAXIMIZATION problem.")
# initialize
ScenarioList = []
with open(csvPrefix+"ScenarioList.csv",'r') as inputFile:
for line in inputFile.readlines():
L = line.split(',')
ScenarioList.append([L[0],float(L[1])])
addstatus = str(len(ScenarioList))+' scenarios read from file: ' + csvPrefix+'ScenarioList.csv'
if verbosity > 0: print(addstatus)
Result.status = Result.status + '\n' + addstatus
PRoptimal = []
with open(csvPrefix+"PRoptimal.csv",'r') as inputFile:
for line in inputFile.readlines():
bzS = line.split(',')
PRoptimal.append( [None, float(bzS[0]), float(bzS[1])] )
addstatus = str(len(PRoptimal))+' PR points read from file: '+ csvPrefix+'PRoptimal.csv (envelope function)'
if verbosity > 0:
print(addstatus)
Result.status = Result.status + '\n' + addstatus
# ensure PR points on envelope function are sorted by probability
PRoptimal.sort(key=operator.itemgetter(1))
PRoptimal[0][0] = 0 # initial lambda (for b=0)
for p in range(1,len(PRoptimal)):
dz = PRoptimal[p][2] - PRoptimal[p-1][2]
db = PRoptimal[p][1] - PRoptimal[p-1][1]
PRoptimal[p][0] = dz/db
if verbosity > 0:
PrintPRpoints(PRoptimal)
Result.PRoptimal = PRoptimal
lambdaval = 0.
lagrUtil.Set_ParmValue(ph, options.lambda_parm_name,lambdaval)
# IMPORTANT: Preprocess the scenario instances
# before fixing variables, otherwise they
# will be preprocessed out of the expressions
# and the output_fixed_variable_bounds option
# will have no effect when we update the
# fixed variable values (and then assume we
# do not need to preprocess again because
# of this option).
ph._preprocess_scenario_instances()
## read scenarios to select for each PR point on envelope function
with open(csvPrefix+"OptimalSelections.csv",'r') as inputFile:
OptimalSelections = []
for line in inputFile.readlines():
if len(line) == 0: break # eof
selections = line.split(',')
L = len(selections)
Ls = len(selections[L-1])
selections[L-1] = selections[L-1][0:Ls-1]
if verbosity > 1:
print(str(selections))
OptimalSelections.append(selections)
Result.OptimalSelections = OptimalSelections
addstatus = str(len(OptimalSelections)) + ' Optimal selections read from file: ' \
+ csvPrefix + 'OptimalSelections.csv'
Result.status = Result.status + '\n' + addstatus
if len(OptimalSelections) == len(PRoptimal):
if verbosity > 0:
print(addstatus)
else:
addstatus = addstatus + '\n** Number of selections not equal to number of PR points'
print(addstatus)
Result.status = Result.status + '\n' + addstatus
print(str(OptimalSelections))
print((PRoptimal))
return Result
#####################################################################################
# get probabilities
if probFileName is None:
# ...generate from widest gap regions
PRlist = FindPRpoints(options, PRoptimal)
else:
# ...read probabilities
probList = []
with open(probFileName,'r') as inputFile:
if verbosity > 0:
print("reading from probList = "+probFileName)
for line in inputFile.readlines(): # 1 probability per line
if len(line) == 0:
break
prob = float(line)
probList.append(prob)
if verbosity > 0:
print("\t "+str(len(probList))+" probabilities")
if verbosity > 1:
print(str(probList))
PRlist = GetPoints(options, PRoptimal, probList)
if verbosity > 1:
print("PRlist:")
for interval in PRlist:
print(str(interval))
# We now have PRlist = [[i, b], ...], where b is in PRoptimal interval (i-1,i)
addstatus = str(len(PRlist)) + ' probabilities'
if verbosity > 0:
print(addstatus)
Result.status = Result.status + '\n' + addstatus
#####################################################################################
lapsedTime = time.time() - STARTTIME
addstatus = 'Initialize complete...lapsed time = ' + str(lapsedTime)
if verbosity > 1:
print(addstatus)
Result.status = Result.status + '\n' + addstatus
#####################################################################################
if verbosity > 1:
print("\nlooping over Intervals to generate PR points by flipping heuristic")
Result.morePR = []
for interval in PRlist:
lapsedTime = time.time() - STARTTIME
if lapsedTime > MaxTime:
addstatus = '** lapsed time = ' + str(lapsedTime) + ' > max time = ' + str(MaxTime)
if verbosity > 0: print(addstatus)
Result.status = Result.status + '\n' + addstatus
break
i = interval[0] # = PR point index
b = interval[1] # = target probability to reach by flipping from upper endpoint
bU = PRoptimal[i][1] # = upper endpoint
bL = PRoptimal[i-1][1] # = lower endpoint
if verbosity > 1:
print( "target probability = "+str(b)+" < bU = PRoptimal[" + str(i) + "][1]" \
" and > bL = PRoptimal["+str(i-1)+"][1]")
if b < bL or b > bU:
addstatus = '** probability = '+str(b) + ', not in gap interval: (' \
+ str(bL) + ', ' + str(bU) + ')'
print(addstatus)
print(str(PRoptimal))
print(str(PRlist))
Result.status = Result.status + '\n' + addstatus
return Result
if verbosity > 1:
print( "i = "+str(i)+" : Starting with bU = "+str(bU)+" having "+ \
str(len(OptimalSelections[i]))+ " selections:")
print(str(OptimalSelections[i]))
# first fix all scenarios = 0
for sname, sprob in ScenarioList:
scenario = ph._scenario_tree.get_scenario(sname)
lagrUtil.FixIndicatorVariableOneScenario(ph,
scenario,
IndVarName,
0)
# now fix optimal selections = 1
for sname in OptimalSelections[i]:
scenario = ph._scenario_tree.get_scenario(sname)
lagrUtil.FixIndicatorVariableOneScenario(ph,
scenario,
IndVarName,
1)
# flip scenario selections from bU until we reach b (target probability)
bNew = bU
for sname, sprob in ScenarioList:
scenario = ph._scenario_tree.get_scenario(sname)
if bNew - sprob < b:
continue
instance = ph._instances[sname]
if getattr(instance, IndVarName).value == 0:
continue
bNew = bNew - sprob
# flipped scenario selection
lagrUtil.FixIndicatorVariableOneScenario(ph,
scenario,
IndVarName,
0)
if verbosity > 1:
print("\tflipped "+sname+" with prob = "+str(sprob)+" ...bNew = "+str(bNew))
if verbosity > 1:
print("\tflipped selections reach "+str(bNew)+" >= target = "+str(b)+" (bL = "+str(bL)+")")
if bNew <= bL + betaTol or bNew >= bU - betaTol:
if verbosity > 0:
print("\tNot generating PR point...flipping from bU failed")
continue # to next interval in list
# ready to solve to get cost for fixed scenario selections associated with probability = bNew
if verbosity > 1:
# check that scenarios are fixed as they should be
totalprob = 0.
for scenario in ScenarioList:
sname = scenario[0]
sprob = scenario[1]
instance = ph._instances[sname]
print("fix "+sname+" = "+str(getattr(instance,IndVarName).value)+\
" is "+str(getattr(instance,IndVarName).fixed)+" probability = "+str(sprob))
if getattr(instance,IndVarName).value == 1:
totalprob = totalprob + sprob
lambdaval = getattr(instance, multName).value
print("\ttotal probability = %f" % totalprob)
# solve (all delta fixed); lambda=0, so z = Lagrangian
if verbosity > 0:
print("solve begins %s" % datetime_string())
print("\t- lambda = %f" % lambdaval)
SolStat, z = lagrUtil.solve_ph_code(ph, options)
b = Compute_ExpectationforVariable(ph, IndVarName, CCStageNum)
if verbosity > 0:
print("solve ends %s" % datetime_string())
print("\t- SolStat = %s" % str(SolStat))
print("\t- b = %s" % str(b))
print("\t- z = %s" % str(z))
print("(adding to more PR points)")
Result.morePR.append([None,b,z])
if verbosity > 1:
PrintPRpoints(Result.morePR)
######################################################
# end loop over target probabilities
with open(csvPrefix+"PRmore.csv",'w') as outFile:
for point in Result.morePR:
outFile.write(str(point[1])+','+str(point[2]))
addstatus = str(len(Result.morePR)) + ' PR points written to file: '+ csvPrefix + 'PRmore.csv'
if verbosity > 0: print(addstatus)
Result.status = Result.status + '\n' + addstatus
addstatus = 'lapsed time = ' + putcommas(time.time() - STARTTIME)
if verbosity > 0: print(addstatus)
Result.status = Result.status + '\n' + addstatus
return Result
################################
# LagrangeMorePR ends here
################################
#### start run ####
AllInOne = False
# VERYSTARTTIME=time.time()
# print "##############VERYSTARTTIME:",str(VERYSTARTTIME-VERYSTARTTIME)
##########################
# options defined here
##########################
try:
conf_options_parser = construct_ph_options_parser("lagrange [options]")
conf_options_parser.add_argument("--beta-min",
help="The min beta level for the chance constraint. Default is None",
action="store",
dest="beta_min",
type=float,
default=None)
conf_options_parser.add_argument("--beta-max",
help="The beta level for the chance constraint. Default is None",
action="store",
dest="beta_max",
type=float,
default=None)
conf_options_parser.add_argument("--min-prob",
help="Tolerance for testing probability > 0. Default is 1e-5",
action="store",
dest="min_prob",
type=float,
default=1e-5)
conf_options_parser.add_argument("--beta-tol",
help="Tolerance for testing equality to beta. Default is 10^-2",
action="store",
dest="beta_tol",
type=float,
default=1e-2)
conf_options_parser.add_argument("--Lagrange-gap",
help="The (relative) Lagrangian gap acceptable for the chance constraint. Default is 10^-4.",
action="store",
type=float,
dest="Lagrange_gap",
default=0.0001)
conf_options_parser.add_argument("--max-number",
help="The max number of PR points. Default = 10.",
action="store",
dest="max_number",
type=int,
default=10)
conf_options_parser.add_argument("--max-time",
help="Maximum time (seconds). Default is 3600.",
action="store",
dest="max_time",
type=float,
default=3600)
conf_options_parser.add_argument("--csvPrefix",
help="Input file name prefix. Default is ''",
action="store",
dest="csvPrefix",
type=str,
default="")
conf_options_parser.add_argument("--lambda-parm-name",
help="The name of the lambda parameter in the model. Default is lambdaMult",
action="store",
dest="lambda_parm_name",
type=str,
default="lambdaMult")
conf_options_parser.add_argument("--indicator-var-name",
help="The name of the indicator variable for the chance constraint. The default is delta",
action="store",
dest="indicator_var_name",
type=str,
default="delta")
conf_options_parser.add_argument("--stage-num",
help="The stage number of the CC indicator variable (number, not name). Default is 2",
action="store",
dest="stage_num",
type=int,
default=2)
conf_options_parser.add_argument("--verbosity",
help="verbosity=0 is no extra output, =1 is medium, =2 is debug, =3 super-debug. Default is 1.",
action="store",
dest="verbosity",
type=int,
default=1)
conf_options_parser.add_argument("--prob-file",
help="file name specifiying probabilities",
action="store",
dest="probFileName",
type=str,
default=None)
# The following needed for solve_ph_code in lagrangeutils
conf_options_parser.add_argument("--solve-with-ph",
help="Perform solves via PH rather than an EF solve. Default is False",
action="store_true",
dest="solve_with_ph",
default=False)
################################################################
options = conf_options_parser.parse_args(args=args)
# temporary hack
options._ef_options = conf_options_parser._ef_options
options._ef_options.import_argparse(options)
except SystemExit as _exc:
# the parser throws a system exit if "-h" is specified - catch
# it to exit gracefully.
return _exc.code
if options.verbose is True:
print("Loading reference model and scenario tree")
scenario_instance_factory = \
ScenarioTreeInstanceFactory(options.model_directory,
options.instance_directory,
options.verbose)
full_scenario_tree = \
GenerateScenarioTreeForPH(options,
scenario_instance_factory)
solver_manager = SolverManagerFactory(options.solver_manager_type)
if solver_manager is None:
raise ValueError("Failed to create solver manager of "
"type="+options.solver_manager_type+
" specified in call to PH constructor")
if isinstance(solver_manager,
pyomo.solvers.plugins.smanager.phpyro.SolverManager_PHPyro):
solver_manager.deactivate()
raise ValueError("PHPyro can not be used as the solver manager")
try:
if (scenario_instance_factory is None) or (full_scenario_tree is None):
raise RuntimeError("***ERROR: Failed to initialize the model and/or scenario tree data.")
# load_model gets called again, so lets make sure unarchived directories are used
options.model_directory = scenario_instance_factory._model_filename
options.instance_directory = scenario_instance_factory._scenario_tree_filename
scenario_count = len(full_scenario_tree._stages[-1]._tree_nodes)
# create ph objects for finding the solution. we do this even if
# we're solving the extensive form
if options.verbose is True:
print("Loading scenario instances and initializing scenario tree for full problem.")
########## Here is where multiplier search is called ############
Result = LagrangeMorePR()
#####################################################################################
finally:
solver_manager.deactivate()
# delete temporary unarchived directories
scenario_instance_factory.close()
print("\n==================== returned from LagrangeMorePR")
print(str(Result.status))
try:
print("Envelope:")
print(str(PrintPRpoints(Result.PRoptimal)))
print("\nAdded:")
PrintPRpoints(Result.morePR)
except:
print("from run: PrintPRpoints failed")
sys.exit()
# combine tables and sort by probability
if len(Result.morePR) > 0:
PRpoints = copy.deepcopy(Result.PRoptimal)
for lbz in Result.morePR: PRpoints.append(lbz)
print("Combined table of PR points (sorted):")
PRpoints.sort(key=operator.itemgetter(1))
print(str(PrintPRpoints(PRpoints)))
def run(args=None):
##########################================================#########
# to import plugins
import pyomo.environ
import pyomo.solvers.plugins.smanager.phpyro
import pyomo.solvers.plugins.smanager.pyro
def partialLagrangeParametric(args=None):
print("lagrangeParam begins ")
blanks = " " # used for formatting print statements
class Object(object):
pass
Result = Object()
# options used
IndVarName = options.indicator_var_name
CCStageNum = options.stage_num
alphaTol = options.alpha_tol
MaxMorePR = options.MaxMorePR # option to include up to this many PR points above F^* with all delta fixed
outputFilePrefix = options.outputFilePrefix
# We write ScenarioList = name, probability
# PRoptimal = probability, min-cost, [selections]
# PRmore = probability, min-cost, [selections]
# ================ sorted by probability ========================
#
# These can be read to avoid re-computing points
ph = PHFromScratch(options)
Result.ph = ph
rootnode = ph._scenario_tree._stages[0]._tree_nodes[
0] # use rootnode to loop over scenarios
if find_active_objective(ph._scenario_tree._scenarios[0]._instance,
safety_checks=True).is_minimizing():
print("We are solving a MINIMIZATION problem.\n")
else:
print("We are solving a MAXIMIZATION problem.\n")
# initialize
ScenarioList = []
lambdaval = 0.
lagrUtil.Set_ParmValue(ph, options.lambda_parm_name, lambdaval)
# IMPORTANT: Preprocess the scenario instances
# before fixing variables, otherwise they
# will be preprocessed out of the expressions
# and the output_fixed_variable_bounds option
# will have no effect when we update the
# fixed variable values (and then assume we
# do not need to preprocess again because
# of this option).
ph._preprocess_scenario_instances()
lagrUtil.FixAllIndicatorVariables(ph, IndVarName, 0)
for scenario in rootnode._scenarios:
ScenarioList.append((scenario._name, scenario._probability))
# sorts from min to max probability
ScenarioList.sort(key=operator.itemgetter(1))
with open(outputFilePrefix + 'ScenarioList.csv', 'w') as outFile:
for scenario in ScenarioList:
outFile.write(scenario[0] + ", " + str(scenario[1]) + "\n")
Result.ScenarioList = ScenarioList
print("lambda= " + str(lambdaval) + " ...run begins " +
str(len(ScenarioList)) + " scenarios")
SolStat, zL = lagrUtil.solve_ph_code(ph, options)
print("\t...ends")
bL = Compute_ExpectationforVariable(ph, IndVarName, CCStageNum)
if bL > 0:
print("** bL = " + str(bL) + " > 0")
return Result
print("Initial cost = " + str(zL) + " for bL = " + str(bL))
lagrUtil.FixAllIndicatorVariables(ph, IndVarName, 1)
print("lambda= " + str(lambdaval) + " ...run begins")
SolStat, zU = lagrUtil.solve_ph_code(ph, options)
print("\t...ends")
bU = Compute_ExpectationforVariable(ph, IndVarName, CCStageNum)
if bU < 1:
print("** bU = " + str(bU) + " < 1")
lagrUtil.FreeAllIndicatorVariables(ph, IndVarName)
Result.lbz = [[0, bL, zL], [None, bU, zU]]
Result.selections = [[], ScenarioList]
NumIntervals = 1
print("initial gap = " + str(1 - zL / zU) + " \n")
print("End of test; this is only a test.")
return Result
################################
# LagrangeParametric ends here
################################
#### start run ####
AllInOne = False
##########################
# options defined here
##########################
try:
conf_options_parser = construct_ph_options_parser("lagrange [options]")
conf_options_parser.add_argument(
"--alpha",
help="The alpha level for the chance constraint. Default is 0.05",
action="store",
dest="alpha",
type=float,
default=0.05)
conf_options_parser.add_argument(
"--alpha-min",
help=
"The min alpha level for the chance constraint. Default is None",
action="store",
dest="alpha_min",
type=float,
default=None)
conf_options_parser.add_argument(
"--alpha-max",
help="The alpha level for the chance constraint. Default is None",
action="store",
dest="alpha_max",
type=float,
default=None)
conf_options_parser.add_argument(
"--min-prob",
help="Tolerance for testing probability > 0. Default is 1e-5",
action="store",
dest="min_prob",
type=float,
default=1e-5)
conf_options_parser.add_argument(
"--alpha-tol",
help="Tolerance for testing equality to alpha. Default is 1e-5",
action="store",
dest="alpha_tol",
type=float,
default=1e-5)
conf_options_parser.add_argument(
"--MaxMorePR",
help=
"Generate up to this many additional PR points after response function. Default is 0",
action="store",
dest="MaxMorePR",
type=int,
default=0)
conf_options_parser.add_argument(
"--outputFilePrefix",
help="Output file name. Default is ''",
action="store",
dest="outputFilePrefix",
type=str,
default="")
conf_options_parser.add_argument(
"--stage-num",
help=
"The stage number of the CC indicator variable (number, not name). Default is 2",
action="store",
dest="stage_num",
type=int,
default=2)
conf_options_parser.add_argument(
"--lambda-parm-name",
help=
"The name of the lambda parameter in the model. Default is lambdaMult",
action="store",
dest="lambda_parm_name",
type=str,
default="lambdaMult")
conf_options_parser.add_argument(
"--indicator-var-name",
help=
"The name of the indicator variable for the chance constraint. The default is delta",
action="store",
dest="indicator_var_name",
type=str,
default="delta")
conf_options_parser.add_argument(
"--use-Loane-cuts",
help="Add the Loane cuts if there is a gap. Default is False",
action="store_true",
dest="add_Loane_cuts",
default=False)
conf_options_parser.add_argument(
"--fofx-var-name",
help=
"(Loane) The name of the model's auxiliary variable that is constrained to be f(x). Default is fofox",
action="store",
dest="fofx_var_name",
type=str,
default="fofx")
conf_options_parser.add_argument(
"--solve-with-ph",
help=
"Perform solves via PH rather than an EF solve. Default is False",
action="store_true",
dest="solve_with_ph",
default=False)
conf_options_parser.add_argument(
"--skip-graph",
help=
"Do not show the graph at the end. Default is False (i.e. show the graph)",
action="store_true",
dest="skip_graph",
default=False)
conf_options_parser.add_argument(
"--write-xls",
help="Write results into a xls file. Default is False",
action="store_true",
dest="write_xls",
default=False)
conf_options_parser.add_argument(
"--skip-ExpFlip",
help=
"Do not show the results for flipping the indicator variable for each scenario. Default is False (i.e. show the flipping-results)",
action="store_true",
dest="skip_ExpFlip",
default=False)
conf_options_parser.add_argument(
"--HeurFlip",
help=
"The number of solutions to evaluate after the heuristic. Default is 3. For 0 the heuristic flip gets skipped.",
action="store",
type=int,
dest="HeurFlip",
default=3)
conf_options_parser.add_argument(
"--HeurMIP",
help=
"The mipgap for the scenariowise solves in the heuristic. Default is 0.0001",
action="store",
type=float,
dest="HeurMIP",
default=0.0001)
conf_options_parser.add_argument(
"--interactive",
help="Enable interactive version of the code. Default is False.",
action="store_true",
dest="interactive",
default=False)
conf_options_parser.add_argument(
"--Lgap",
help=
"The (relative) Lagrangian gap acceptable for the chance constraint. Default is 10^-4",
action="store",
type=float,
dest="LagrangeGap",
default=0.0001)
conf_options_parser.add_argument(
"--lagrange-method",
help="The Lagrange multiplier search method",
action="store",
dest="lagrange_search_method",
type=str,
default="tangential")
conf_options_parser.add_argument(
"--max-lambda",
help="The max value of the multiplier. Default=10^10",
action="store",
dest="max_lambda",
type=float,
default=10**10)
conf_options_parser.add_argument(
"--min-lambda",
help="The min value of the multiplier. Default=0.0",
action="store",
dest="min_lambda",
type=float,
default=0)
conf_options_parser.add_argument(
"--min-probability",
help="The min value of scenario probability. Default=10^-15",
action="store",
dest="min_probability",
type=float,
default=10**(-15))
################################################################
options = conf_options_parser.parse_args(args=args)
# temporary hack
options._ef_options = conf_options_parser._ef_options
options._ef_options.import_argparse(options)
except SystemExit as _exc:
# the parser throws a system exit if "-h" is specified - catch
# it to exit gracefully.
return _exc.code
# load the reference model and create the scenario tree - no
# scenario instances yet.
if options.verbose:
print("Loading reference model and scenario tree")
#scenario_instance_factory, full_scenario_tree = load_models(options)
scenario_instance_factory = \
ScenarioTreeInstanceFactory(options.model_directory,
options.instance_directory)
full_scenario_tree = \
GenerateScenarioTreeForPH(options,
scenario_instance_factory)
solver_manager = SolverManagerFactory(options.solver_manager_type)
if solver_manager is None:
raise ValueError("Failed to create solver manager of "
"type=" + options.solver_manager_type +
" specified in call to PH constructor")
if isinstance(solver_manager,
pyomo.solvers.plugins.smanager.phpyro.SolverManager_PHPyro):
solver_manager.deactivate()
raise ValueError("PHPyro can not be used as the solver manager")
try:
if (scenario_instance_factory is None) or (full_scenario_tree is None):
raise RuntimeError(
"***ERROR: Failed to initialize model and/or the scenario tree data."
)
# load_model gets called again, so lets make sure unarchived directories are used
options.model_directory = scenario_instance_factory._model_filename
options.instance_directory = scenario_instance_factory._scenario_tree_filename
scenario_count = len(full_scenario_tree._stages[-1]._tree_nodes)
# create ph objects for finding the solution. we do this even if
# we're solving the extensive form
if options.verbose:
print(
"Loading scenario instances and initializing scenario tree for full problem."
)
########## Here is where multiplier search is called ############
Result = partialLagrangeParametric()
#####################################################################################
finally:
solver_manager.deactivate()
# delete temporary unarchived directories
scenario_instance_factory.close()
print("\nreturned from partialLagrangeParametric")
def run(args=None):
##########################================================#########
# to import plugins
import pyomo.environ
import pyomo.solvers.plugins.smanager.phpyro
import pyomo.solvers.plugins.smanager.pyro
def partialLagrangeParametric(args=None):
print("lagrangeParam begins ")
blanks = " " # used for formatting print statements
class Object(object): pass
Result = Object()
# options used
IndVarName = options.indicator_var_name
CCStageNum = options.stage_num
alphaTol = options.alpha_tol
MaxMorePR = options.MaxMorePR # option to include up to this many PR points above F^* with all delta fixed
outputFilePrefix = options.outputFilePrefix
# We write ScenarioList = name, probability
# PRoptimal = probability, min-cost, [selections]
# PRmore = probability, min-cost, [selections]
# ================ sorted by probability ========================
#
# These can be read to avoid re-computing points
ph = PHFromScratch(options)
Result.ph = ph
rootnode = ph._scenario_tree._stages[0]._tree_nodes[0] # use rootnode to loop over scenarios
if find_active_objective(ph._scenario_tree._scenarios[0]._instance,safety_checks=True).is_minimizing():
print("We are solving a MINIMIZATION problem.\n")
else:
print("We are solving a MAXIMIZATION problem.\n")
# initialize
ScenarioList = []
lambdaval = 0.
lagrUtil.Set_ParmValue(ph,
options.lambda_parm_name,
lambdaval)
# IMPORTANT: Preprocess the scenario instances
# before fixing variables, otherwise they
# will be preprocessed out of the expressions
# and the output_fixed_variable_bounds option
# will have no effect when we update the
# fixed variable values (and then assume we
# do not need to preprocess again because
# of this option).
ph._preprocess_scenario_instances()
lagrUtil.FixAllIndicatorVariables(ph, IndVarName, 0)
for scenario in rootnode._scenarios:
ScenarioList.append((scenario._name,
scenario._probability))
# sorts from min to max probability
ScenarioList.sort(key=operator.itemgetter(1))
with open(outputFilePrefix+'ScenarioList.csv','w') as outFile:
for scenario in ScenarioList:
outFile.write(scenario[0]+ ", " +str(scenario[1])+"\n")
Result.ScenarioList = ScenarioList
print("lambda= "+str(lambdaval)+" ...run begins "+str(len(ScenarioList))+" scenarios")
SolStat, zL = lagrUtil.solve_ph_code(ph, options)
print("\t...ends")
bL = Compute_ExpectationforVariable(ph,
IndVarName,
CCStageNum)
if bL > 0:
print("** bL = "+str(bL)+" > 0")
return Result
print("Initial cost = "+str(zL)+" for bL = "+str(bL))
lagrUtil.FixAllIndicatorVariables(ph, IndVarName, 1)
print("lambda= "+str(lambdaval)+" ...run begins")
SolStat, zU = lagrUtil.solve_ph_code(ph, options)
print("\t...ends")
bU = Compute_ExpectationforVariable(ph,
IndVarName,
CCStageNum)
if bU < 1:
print("** bU = "+str(bU)+" < 1")
lagrUtil.FreeAllIndicatorVariables(ph, IndVarName)
Result.lbz = [ [0,bL,zL], [None,bU,zU] ]
Result.selections = [[], ScenarioList]
NumIntervals = 1
print("initial gap = "+str(1-zL/zU)+" \n")
print("End of test; this is only a test.")
return Result
################################
# LagrangeParametric ends here
################################
#### start run ####
AllInOne = False
##########################
# options defined here
##########################
try:
conf_options_parser = construct_ph_options_parser("lagrange [options]")
conf_options_parser.add_argument("--alpha",
help="The alpha level for the chance constraint. Default is 0.05",
action="store",
dest="alpha",
type=float,
default=0.05)
conf_options_parser.add_argument("--alpha-min",
help="The min alpha level for the chance constraint. Default is None",
action="store",
dest="alpha_min",
type=float,
default=None)
conf_options_parser.add_argument("--alpha-max",
help="The alpha level for the chance constraint. Default is None",
action="store",
dest="alpha_max",
type=float,
default=None)
conf_options_parser.add_argument("--min-prob",
help="Tolerance for testing probability > 0. Default is 1e-5",
action="store",
dest="min_prob",
type=float,
default=1e-5)
conf_options_parser.add_argument("--alpha-tol",
help="Tolerance for testing equality to alpha. Default is 1e-5",
action="store",
dest="alpha_tol",
type=float,
default=1e-5)
conf_options_parser.add_argument("--MaxMorePR",
help="Generate up to this many additional PR points after response function. Default is 0",
action="store",
dest="MaxMorePR",
type=int,
default=0)
conf_options_parser.add_argument("--outputFilePrefix",
help="Output file name. Default is ''",
action="store",
dest="outputFilePrefix",
type=str,
default="")
conf_options_parser.add_argument("--stage-num",
help="The stage number of the CC indicator variable (number, not name). Default is 2",
action="store",
dest="stage_num",
type=int,
default=2)
conf_options_parser.add_argument("--lambda-parm-name",
help="The name of the lambda parameter in the model. Default is lambdaMult",
action="store",
dest="lambda_parm_name",
type=str,
default="lambdaMult")
conf_options_parser.add_argument("--indicator-var-name",
help="The name of the indicator variable for the chance constraint. The default is delta",
action="store",
dest="indicator_var_name",
type=str,
default="delta")
conf_options_parser.add_argument("--use-Loane-cuts",
help="Add the Loane cuts if there is a gap. Default is False",
action="store_true",
dest="add_Loane_cuts",
default=False)
conf_options_parser.add_argument("--fofx-var-name",
help="(Loane) The name of the model's auxiliary variable that is constrained to be f(x). Default is fofox",
action="store",
dest="fofx_var_name",
type=str,
default="fofx")
conf_options_parser.add_argument("--solve-with-ph",
help="Perform solves via PH rather than an EF solve. Default is False",
action="store_true",
dest="solve_with_ph",
default=False)
conf_options_parser.add_argument("--skip-graph",
help="Do not show the graph at the end. Default is False (i.e. show the graph)",
action="store_true",
dest="skip_graph",
default=False)
conf_options_parser.add_argument("--write-xls",
help="Write results into a xls file. Default is False",
action="store_true",
dest="write_xls",
default=False)
conf_options_parser.add_argument("--skip-ExpFlip",
help="Do not show the results for flipping the indicator variable for each scenario. Default is False (i.e. show the flipping-results)",
action="store_true",
dest="skip_ExpFlip",
default=False)
conf_options_parser.add_argument("--HeurFlip",
help="The number of solutions to evaluate after the heuristic. Default is 3. For 0 the heuristic flip gets skipped.",
action="store",
type=int,
dest="HeurFlip",
default=3)
conf_options_parser.add_argument("--HeurMIP",
help="The mipgap for the scenariowise solves in the heuristic. Default is 0.0001",
action="store",
type=float,
dest="HeurMIP",
default=0.0001)
conf_options_parser.add_argument("--interactive",
help="Enable interactive version of the code. Default is False.",
action="store_true",
dest="interactive",
default=False)
conf_options_parser.add_argument("--Lgap",
help="The (relative) Lagrangian gap acceptable for the chance constraint. Default is 10^-4",
action="store",
type=float,
dest="LagrangeGap",
default=0.0001)
conf_options_parser.add_argument("--lagrange-method",
help="The Lagrange multiplier search method",
action="store",
dest="lagrange_search_method",
type=str,
default="tangential")
conf_options_parser.add_argument("--max-lambda",
help="The max value of the multiplier. Default=10^10",
action="store",
dest="max_lambda",
type=float,
default=10**10)
conf_options_parser.add_argument("--min-lambda",
help="The min value of the multiplier. Default=0.0",
action="store",
dest="min_lambda",
type=float,
default=0)
conf_options_parser.add_argument("--min-probability",
help="The min value of scenario probability. Default=10^-15",
action="store",
dest="min_probability",
type=float,
default=10**(-15))
################################################################
options = conf_options_parser.parse_args(args=args)
# temporary hack
options._ef_options = conf_options_parser._ef_options
options._ef_options.import_argparse(options)
except SystemExit as _exc:
# the parser throws a system exit if "-h" is specified - catch
# it to exit gracefully.
return _exc.code
# load the reference model and create the scenario tree - no
# scenario instances yet.
if options.verbose:
print("Loading reference model and scenario tree")
#scenario_instance_factory, full_scenario_tree = load_models(options)
scenario_instance_factory = \
ScenarioTreeInstanceFactory(options.model_directory,
options.instance_directory,
options.verbose)
full_scenario_tree = \
GenerateScenarioTreeForPH(options,
scenario_instance_factory)
solver_manager = SolverManagerFactory(options.solver_manager_type)
if solver_manager is None:
raise ValueError("Failed to create solver manager of "
"type="+options.solver_manager_type+
" specified in call to PH constructor")
if isinstance(solver_manager,
pyomo.solvers.plugins.smanager.phpyro.SolverManager_PHPyro):
solver_manager.deactivate()
raise ValueError("PHPyro can not be used as the solver manager")
try:
if (scenario_instance_factory is None) or (full_scenario_tree is None):
raise RuntimeError("***ERROR: Failed to initialize model and/or the scenario tree data.")
# load_model gets called again, so lets make sure unarchived directories are used
options.model_directory = scenario_instance_factory._model_filename
options.instance_directory = scenario_instance_factory._scenario_tree_filename
scenario_count = len(full_scenario_tree._stages[-1]._tree_nodes)
# create ph objects for finding the solution. we do this even if
# we're solving the extensive form
if options.verbose:
print("Loading scenario instances and initializing scenario tree for full problem.")
########## Here is where multiplier search is called ############
Result = partialLagrangeParametric()
#####################################################################################
finally:
solver_manager.deactivate()
# delete temporary unarchived directories
scenario_instance_factory.close()
print("\nreturned from partialLagrangeParametric")
