def test_sens(self):
termcomp = TerminateComp(max_sens=3)
optProb = Optimization("Paraboloid", termcomp.objfunc)
optProb.addVarGroup("x", 1, type="c", lower=-50.0, upper=50.0, value=0.0)
optProb.addVarGroup("y", 1, type="c", lower=-50.0, upper=50.0, value=0.0)
optProb.finalizeDesignVariables()
optProb.addObj("obj")
optProb.addConGroup("con", 1, lower=-15.0, upper=-15.0, wrt=["x", "y"], linear=True, jac=con_jac)
test_name = "SNOPT_user_termination_sens"
optOptions = {
"Print file": "{}.out".format(test_name),
"Summary file": "{}_summary.out".format(test_name),
}
try:
opt = SNOPT(options=optOptions)
except Error:
raise unittest.SkipTest("Optimizer not available: SNOPT")
sol = opt(optProb, sens=termcomp.sens)
self.assertEqual(termcomp.sens_count, 4)
# Exit code for user requested termination.
self.assertEqual(sol.optInform["value"], 71)
def __call__(self, optimizer, options=None):
""" Run optimization """
system = self._system
variables = self._variables
opt_prob = OptProblem('Optimization', self.obj_func)
for dv_name in variables['dv'].keys():
dv_id = variables['dv'][dv_name]['ID']
value = variables['dv'][dv_name]['value']
lower = variables['dv'][dv_name]['lower']
upper = variables['dv'][dv_name]['upper']
size = system(dv_id).size
opt_prob.addVarGroup(dv_name, size, value=value,
lower=lower, upper=upper)
opt_prob.finalizeDesignVariables()
for func_name in variables['func'].keys():
lower = variables['func'][func_name]['lower']
upper = variables['func'][func_name]['upper']
if lower is None and upper is None:
opt_prob.addObj(func_name)
else:
opt_prob.addCon(func_name, lower=lower, upper=upper)
if options is None:
options = {}
opt = Optimizer(optimizer, options=options)
sol = opt(opt_prob, sens=self.sens_func)
print sol
def test_opt_bug1(self):
# Due to a new feature, there is a TypeError when you optimize a model without a constraint.
optProb = Optimization("Paraboloid", objfunc_no_con)
# Design Variables
optProb.addVarGroup("x", 1, type="c", lower=-50.0, upper=50.0, value=0.0)
optProb.addVarGroup("y", 1, type="c", lower=-50.0, upper=50.0, value=0.0)
optProb.finalizeDesignVariables()
# Objective
optProb.addObj("obj")
test_name = "bugfix_SNOPT_bug1"
optOptions = {
"Major feasibility tolerance": 1e-1,
"Print file": "{}.out".format(test_name),
"Summary file": "{}_summary.out".format(test_name),
}
# Optimizer
try:
opt = SNOPT(options=optOptions)
except Error:
raise unittest.SkipTest("Optimizer not available: SNOPT")
opt(optProb, sens=sens)
def test_opt(self):
# Optimization Object
optProb = Optimization('Paraboloid', objfunc)
# Design Variables
optProb.addVarGroup('x', 1, type='c', lower=-50.0, upper=50.0, value=0.0)
optProb.addVarGroup('y', 1, type='c', lower=-50.0, upper=50.0, value=0.0)
optProb.finalizeDesignVariables()
# Objective
optProb.addObj('obj')
# Equality Constraint
optProb.addConGroup('con', 1, lower=-15.0, upper=-15.0, wrt=['x', 'y'], linear=True, jac=con_jac)
# Check optimization problem:
print(optProb)
# Optimizer
try:
opt = SNOPT(optOptions = {'Major feasibility tolerance' : 1e-1})
except:
raise unittest.SkipTest('Optimizer not available: SNOPT')
sol = opt(optProb, sens=sens)
# Check Solution 7.166667, -7.833334
self.assertAlmostEqual(sol.variables['x'][0].value, 7.166667, places=6)
self.assertAlmostEqual(sol.variables['y'][0].value, -7.833333, places=6)
def __call__(self, optimizer, options=None):
""" Run optimization """
system = self._system
variables = self._variables
opt_prob = OptProblem('Optimization', self.obj_func)
for dv_name in variables['dv'].keys():
dv_id = variables['dv'][dv_name]['ID']
value = variables['dv'][dv_name]['value']
lower = variables['dv'][dv_name]['lower']
upper = variables['dv'][dv_name]['upper']
size = system(dv_id).size
opt_prob.addVarGroup(dv_name,
size,
value=value,
lower=lower,
upper=upper)
opt_prob.finalizeDesignVariables()
for func_name in variables['func'].keys():
lower = variables['func'][func_name]['lower']
upper = variables['func'][func_name]['upper']
if lower is None and upper is None:
opt_prob.addObj(func_name)
else:
opt_prob.addCon(func_name, lower=lower, upper=upper)
if options is None:
options = {}
opt = Optimizer(optimizer, options=options)
sol = opt(opt_prob, sens=self.sens_func)
print sol
def test_opt(self):
# Optimization Object
optProb = Optimization("Paraboloid", objfunc)
# Design Variables
optProb.addVarGroup("x",
1,
type="c",
lower=-50.0,
upper=50.0,
value=0.0)
optProb.addVarGroup("y",
1,
type="c",
lower=-50.0,
upper=50.0,
value=0.0)
optProb.finalizeDesignVariables()
# Objective
optProb.addObj("obj")
# Equality Constraint
optProb.addConGroup("con",
1,
lower=-15.0,
upper=-15.0,
wrt=["x", "y"],
linear=True,
jac=con_jac)
# Check optimization problem:
print(optProb)
test_name = "bugfix_SNOPT_test_opt"
optOptions = {
"Major feasibility tolerance": 1e-1,
"Print file": "{}.out".format(test_name),
"Summary file": "{}_summary.out".format(test_name),
}
# Optimizer
try:
opt = SNOPT(options=optOptions)
except Error:
raise unittest.SkipTest("Optimizer not available: SNOPT")
sol = opt(optProb, sens=sens)
# Check Solution 7.166667, -7.833334
tol = 1e-6
assert_allclose(sol.variables["x"][0].value,
7.166667,
atol=tol,
rtol=tol)
assert_allclose(sol.variables["y"][0].value,
-7.833333,
atol=tol,
rtol=tol)
def __call__(self, optimizer, options=None):
""" Run optimization """
system = self._system
variables = self._variables
opt_prob = OptProblem('Optimization', self.obj_func)
for dv_name in variables['dv'].keys():
dv = variables['dv'][dv_name]
dv_id = dv['ID']
value = dv['value']
lower = dv['lower']
upper = dv['upper']
size = system.vec['u'](dv_id).shape[0]
opt_prob.addVarGroup(dv_name, size, value=value,
lower=lower, upper=upper)
opt_prob.finalizeDesignVariables()
for func_name in variables['func'].keys():
func = variables['func'][func_name]
func_id = func['ID']
lower = func['lower']
upper = func['upper']
linear = func['linear']
get_jacs = func['get_jacs']
size = system.vec['u'](func_id).shape[0]
if lower is None and upper is None:
opt_prob.addObj(func_name)
else:
if func['get_jacs'] is None:
opt_prob.addConGroup(func_name, size,
lower=lower, upper=upper)
else:
jacs_var = get_jacs()
dv_names = []
jacs = {}
for dv_var in jacs_var:
dv_id = self._system.get_id(dv_var)
dv_name = self._get_name(dv_id)
dv_names.append(dv_name)
jacs[dv_name] = jacs_var[dv_var]
opt_prob.addConGroup(func_name, size,
wrt=dv_names,
jac=jacs, linear=linear,
lower=lower, upper=upper)
if options is None:
options = {}
opt = Optimizer(optimizer, options=options)
opt.setOption('Iterations limit', int(1e6))
#opt.setOption('Verify level', 3)
sol = opt(opt_prob, sens=self.sens_func, storeHistory='hist.hst')
print sol
def test_opt_bug_print_2con(self):
# Optimization Object
optProb = Optimization("Paraboloid", objfunc_2con)
# Design Variables
optProb.addVarGroup("x", 1, type="c", lower=-50.0, upper=50.0, value=0.0)
optProb.addVarGroup("y", 1, type="c", lower=-50.0, upper=50.0, value=0.0)
optProb.finalizeDesignVariables()
# Objective
optProb.addObj("obj")
con_jac2 = {}
con_jac2["x"] = -np.ones((2, 1))
con_jac2["y"] = np.ones((2, 1))
con_jac3 = {}
con_jac3["x"] = -np.ones((3, 1))
con_jac3["y"] = np.ones((3, 1))
# Equality Constraint
optProb.addConGroup("con", 2, lower=-15.0, upper=-15.0, wrt=["x", "y"], linear=True, jac=con_jac2)
optProb.addConGroup("con2", 3, lower=-15.0, upper=-15.0, wrt=["x", "y"], linear=True, jac=con_jac3)
# Check optimization problem:
print(optProb)
test_name = "bugfix_SNOPT_bug_print_2con"
optOptions = {
"Major feasibility tolerance": 1e-1,
"Print file": "{}.out".format(test_name),
"Summary file": "{}_summary.out".format(test_name),
}
# Optimizer
try:
opt = SNOPT(options=optOptions)
except Error:
raise unittest.SkipTest("Optimizer not available: SNOPT")
sol = opt(optProb, sens=sens)
print(sol)
def test_opt_bug1(self):
# Due to a new feature, there is a TypeError when you optimize a model without a constraint.
optProb = Optimization('Paraboloid', objfunc_no_con)
# Design Variables
optProb.addVarGroup('x', 1, type='c', lower=-50.0, upper=50.0, value=0.0)
optProb.addVarGroup('y', 1, type='c', lower=-50.0, upper=50.0, value=0.0)
optProb.finalizeDesignVariables()
# Objective
optProb.addObj('obj')
# Optimizer
try:
opt = SNOPT(optOptions = {'Major feasibility tolerance' : 1e-1})
except:
raise unittest.SkipTest('Optimizer not available: SNOPT')
sol = opt(optProb, sens=sens)
def test_obj(self):
termcomp = TerminateComp(max_obj=2)
optProb = Optimization('Paraboloid', termcomp.objfunc)
optProb.addVarGroup('x',
1,
type='c',
lower=-50.0,
upper=50.0,
value=0.0)
optProb.addVarGroup('y',
1,
type='c',
lower=-50.0,
upper=50.0,
value=0.0)
optProb.finalizeDesignVariables()
optProb.addObj('obj')
optProb.addConGroup('con',
1,
lower=-15.0,
upper=-15.0,
wrt=['x', 'y'],
linear=True,
jac=con_jac)
try:
opt = SNOPT()
except:
raise unittest.SkipTest('Optimizer not available: SNOPT')
sol = opt(optProb, sens=termcomp.sens)
self.assertEqual(termcomp.obj_count, 3)
# Exit code for user requested termination.
self.assertEqual(sol.optInform['value'][0], 71)
def test_opt_bug_print_2con(self):
# Optimization Object
optProb = Optimization('Paraboloid', objfunc_2con)
# Design Variables
optProb.addVarGroup('x', 1, type='c', lower=-50.0, upper=50.0, value=0.0)
optProb.addVarGroup('y', 1, type='c', lower=-50.0, upper=50.0, value=0.0)
optProb.finalizeDesignVariables()
# Objective
optProb.addObj('obj')
con_jac2 = {}
con_jac2['x'] = -np.ones((2, 1))
con_jac2['y'] = np.ones((2, 1))
con_jac3 = {}
con_jac3['x'] = -np.ones((3, 1))
con_jac3['y'] = np.ones((3, 1))
# Equality Constraint
optProb.addConGroup('con', 2, lower=-15.0, upper=-15.0, wrt=['x', 'y'], linear=True, jac=con_jac2)
optProb.addConGroup('con2', 3, lower=-15.0, upper=-15.0, wrt=['x', 'y'], linear=True, jac=con_jac3)
# Check optimization problem:
print(optProb)
# Optimizer
try:
opt = SNOPT(optOptions = {'Major feasibility tolerance' : 1e-1})
except:
raise unittest.SkipTest('Optimizer not available: SNOPT')
sol = opt(optProb, sens=sens)
print(sol)
def run(self, problem):
"""pyOpt execution. Note that pyOpt controls the execution, and the
individual optimizers (i.e., SNOPT) control the iteration.
Args
----
problem : `Problem`
Our parent `Problem`.
"""
self.pyopt_solution = None
rel = problem.root._relevance
# Metadata Setup
self.metadata = create_local_meta(None, self.options['optimizer'])
self.iter_count = 0
update_local_meta(self.metadata, (self.iter_count,))
# Initial Run
problem.root.solve_nonlinear(metadata=self.metadata)
opt_prob = Optimization(self.options['title'], self.objfunc)
# Add all parameters
param_meta = self.get_param_metadata()
param_list = list(iterkeys(param_meta))
param_vals = self.get_params()
for name, meta in iteritems(param_meta):
opt_prob.addVarGroup(name, meta['size'], type='c',
value=param_vals[name],
lower=meta['low'], upper=meta['high'])
opt_prob.finalizeDesignVariables()
# Add all objectives
objs = self.get_objectives()
self.quantities = list(iterkeys(objs))
for name in objs:
opt_prob.addObj(name)
# Calculate and save gradient for any linear constraints.
lcons = self.get_constraints(lintype='linear').values()
if len(lcons) > 0:
self.lin_jacs = problem.calc_gradient(param_list, lcons,
return_format='dict')
#print("Linear Gradient")
#print(self.lin_jacs)
# Add all equality constraints
econs = self.get_constraints(ctype='eq', lintype='nonlinear')
con_meta = self.get_constraint_metadata()
self.quantities += list(iterkeys(econs))
for name in econs:
size = con_meta[name]['size']
lower = np.zeros((size))
upper = np.zeros((size))
# Sparsify Jacobian via relevance
wrt = rel.relevant[name].intersection(param_list)
if con_meta[name]['linear'] is True:
opt_prob.addConGroup(name, size, lower=lower, upper=upper,
linear=True, wrt=wrt,
jac=self.lin_jacs[name])
else:
opt_prob.addConGroup(name, size, lower=lower, upper=upper,
wrt=wrt)
# Add all inequality constraints
incons = self.get_constraints(ctype='ineq', lintype='nonlinear')
self.quantities += list(iterkeys(incons))
for name in incons:
size = con_meta[name]['size']
upper = np.zeros((size))
# Sparsify Jacobian via relevance
wrt = rel.relevant[name].intersection(param_list)
if con_meta[name]['linear'] is True:
opt_prob.addConGroup(name, size, upper=upper, linear=True,
wrt=wrt, jac=self.lin_jacs[name])
else:
opt_prob.addConGroup(name, size, upper=upper, wrt=wrt)
# TODO: Support double-sided constraints in openMDAO
# Add all double_sided constraints
#for name, con in iteritems(self.get_2sided_constraints()):
#size = con_meta[name]['size']
#upper = con.high * np.ones((size))
#lower = con.low * np.ones((size))
#name = '%s.out0' % con.pcomp_name
#if con.linear is True:
#opt_prob.addConGroup(name,
#size, upper=upper, lower=lower,
#linear=True, wrt=param_list,
#jac=self.lin_jacs[name])
#else:
#opt_prob.addConGroup(name,
# size, upper=upper, lower=lower)
# Instantiate the requested optimizer
optimizer = self.options['optimizer']
try:
exec('from pyoptsparse import %s' % optimizer)
except ImportError:
msg = "Optimizer %s is not available in this installation." % \
optimizer
raise ImportError(msg)
optname = vars()[optimizer]
opt = optname()
#Set optimization options
for option, value in self.opt_settings.items():
opt.setOption(option, value)
self._problem = problem
# Execute the optimization problem
if self.options['pyopt_diff'] is True:
# Use pyOpt's internal finite difference
fd_step = problem.root.fd_options['step_size']
sol = opt(opt_prob, sens='FD', sensStep=fd_step)
else:
# Use OpenMDAO's differentiator for the gradient
sol = opt(opt_prob, sens=self.gradfunc)
self._problem = None
# Print results
if self.options['print_results'] is True:
print(sol)
# Pull optimal parameters back into framework and re-run, so that
# framework is left in the right final state
dv_dict = sol.getDVs()
for name in self.get_params():
val = dv_dict[name]
self.set_param(name, val)
self.root.solve_nonlinear(metadata=self.metadata)
# Save the most recent solution.
self.pyopt_solution = sol
try:
exit_status = sol.optInform['value']
self.exit_flag = 1
if exit_status > 2: # bad
self.exit_flag = 0
except KeyError: #nothing is here, so something bad happened!
self.exit_flag = 0
def run(self, problem):
"""pyOpt execution. Note that pyOpt controls the execution, and the
individual optimizers (i.e., SNOPT) control the iteration.
Args
----
problem : `Problem`
Our parent `Problem`.
"""
self.pyopt_solution = None
rel = problem.root._probdata.relevance
# Metadata Setup
self.metadata = create_local_meta(None, self.options['optimizer'])
self.iter_count = 0
update_local_meta(self.metadata, (self.iter_count,))
# Initial Run
problem.root.solve_nonlinear(metadata=self.metadata)
opt_prob = Optimization(self.options['title'], self._objfunc)
# Add all parameters
param_meta = self.get_desvar_metadata()
self.indep_list = indep_list = list(iterkeys(param_meta))
param_vals = self.get_desvars()
for name, meta in iteritems(param_meta):
opt_prob.addVarGroup(name, meta['size'], type='c',
value=param_vals[name],
lower=meta['lower'], upper=meta['upper'])
opt_prob.finalizeDesignVariables()
# Add all objectives
objs = self.get_objectives()
self.quantities = list(iterkeys(objs))
self.sparsity = OrderedDict() #{}
for name in objs:
opt_prob.addObj(name)
self.sparsity[name] = self.indep_list
# Calculate and save gradient for any linear constraints.
lcons = self.get_constraints(lintype='linear').keys()
if len(lcons) > 0:
self.lin_jacs = problem.calc_gradient(indep_list, lcons,
return_format='dict')
#print("Linear Gradient")
#print(self.lin_jacs)
# Add all equality constraints
econs = self.get_constraints(ctype='eq', lintype='nonlinear')
con_meta = self.get_constraint_metadata()
self.quantities += list(iterkeys(econs))
for name in self.get_constraints(ctype='eq'):
size = con_meta[name]['size']
lower = upper = con_meta[name]['equals']
# Sparsify Jacobian via relevance
wrt = rel.relevant[name].intersection(indep_list)
self.sparsity[name] = wrt
if con_meta[name]['linear'] is True:
opt_prob.addConGroup(name, size, lower=lower, upper=upper,
linear=True, wrt=wrt,
jac=self.lin_jacs[name])
else:
opt_prob.addConGroup(name, size, lower=lower, upper=upper,
wrt=wrt)
# Add all inequality constraints
incons = self.get_constraints(ctype='ineq', lintype='nonlinear')
self.quantities += list(iterkeys(incons))
for name in self.get_constraints(ctype='ineq'):
size = con_meta[name]['size']
# Bounds - double sided is supported
lower = con_meta[name]['lower']
upper = con_meta[name]['upper']
# Sparsify Jacobian via relevance
wrt = rel.relevant[name].intersection(indep_list)
self.sparsity[name] = wrt
if con_meta[name]['linear'] is True:
opt_prob.addConGroup(name, size, upper=upper, lower=lower,
linear=True, wrt=wrt,
jac=self.lin_jacs[name])
else:
opt_prob.addConGroup(name, size, upper=upper, lower=lower,
wrt=wrt)
# Instantiate the requested optimizer
optimizer = self.options['optimizer']
try:
exec('from pyoptsparse import %s' % optimizer)
except ImportError:
msg = "Optimizer %s is not available in this installation." % \
optimizer
raise ImportError(msg)
optname = vars()[optimizer]
opt = optname()
#Set optimization options
for option, value in self.opt_settings.items():
opt.setOption(option, value)
self._problem = problem
# Execute the optimization problem
if self.options['pyopt_diff'] is True:
# Use pyOpt's internal finite difference
fd_step = problem.root.fd_options['step_size']
sol = opt(opt_prob, sens='FD', sensStep=fd_step, storeHistory=self.hist_file)
else:
# Use OpenMDAO's differentiator for the gradient
sol = opt(opt_prob, sens=self._gradfunc, storeHistory=self.hist_file)
self._problem = None
# Print results
if self.options['print_results'] is True:
print(sol)
# Pull optimal parameters back into framework and re-run, so that
# framework is left in the right final state
dv_dict = sol.getDVs()
for name in indep_list:
val = dv_dict[name]
self.set_desvar(name, val)
self.root.solve_nonlinear(metadata=self.metadata)
# Save the most recent solution.
self.pyopt_solution = sol
try:
exit_status = sol.optInform['value']
self.exit_flag = 1
if exit_status > 2: # bad
self.exit_flag = 0
except KeyError: #nothing is here, so something bad happened!
self.exit_flag = 0
def __call__(self, optimizer, options=None):
""" Run optimization """
system = self._system
variables = self._variables
opt_prob = OptProblem('Optimization', self.obj_func)
for dv_name in variables['dv'].keys():
dv = variables['dv'][dv_name]
dv_id = dv['ID']
value = dv['value']
lower = dv['lower']
upper = dv['upper']
size = system.vec['u'](dv_id).shape[0]
opt_prob.addVarGroup(dv_name,
size,
value=value,
lower=lower,
upper=upper)
opt_prob.finalizeDesignVariables()
for func_name in variables['func'].keys():
func = variables['func'][func_name]
func_id = func['ID']
lower = func['lower']
upper = func['upper']
linear = func['linear']
get_jacs = func['get_jacs']
size = system.vec['u'](func_id).shape[0]
if lower is None and upper is None:
opt_prob.addObj(func_name)
else:
if func['get_jacs'] is None:
opt_prob.addConGroup(func_name,
size,
lower=lower,
upper=upper)
else:
jacs_var = get_jacs()
dv_names = []
jacs = {}
for dv_var in jacs_var:
dv_id = self._system.get_id(dv_var)
dv_name = self._get_name(dv_id)
dv_names.append(dv_name)
jacs[dv_name] = jacs_var[dv_var]
opt_prob.addConGroup(func_name,
size,
wrt=dv_names,
jac=jacs,
linear=linear,
lower=lower,
upper=upper)
if options is None:
options = {}
opt = Optimizer(optimizer, options=options)
opt.setOption('Iterations limit', int(1e6))
#opt.setOption('Verify level', 3)
sol = opt(opt_prob, sens=self.sens_func, storeHistory='hist.hst')
print sol
def __call__(self, optimizer, options=None):
""" Run optimization """
system = self._system
variables = self._variables
opt_prob = OptProblem('Optimization', self.obj_func)
for dv_name in variables['dv'].keys():
dv = variables['dv'][dv_name]
dv_id = dv['ID']
if dv['value'] is not None:
value = dv['value']
else:
value = system.vec['u'](dv_id)
scale = dv['scale']
lower = dv['lower']
upper = dv['upper']
size = system.vec['u'](dv_id).shape[0]
opt_prob.addVarGroup(dv_name, size, value=value, scale=scale,
lower=lower, upper=upper)
opt_prob.finalizeDesignVariables()
for func_name in variables['func'].keys():
func = variables['func'][func_name]
func_id = func['ID']
lower = func['lower']
upper = func['upper']
linear = func['linear']
get_jacs = func['get_jacs']
sys = func['sys']
size = system.vec['u'](func_id).shape[0]
if lower is None and upper is None:
opt_prob.addObj(func_name)
else:
if get_jacs is not None:
jacs_var = get_jacs()
dv_names = []
jacs = {}
for dv_var in jacs_var:
dv_id = self._system.get_id(dv_var)
dv_name = self._get_name(dv_id)
dv_names.append(dv_name)
jacs[dv_name] = jacs_var[dv_var]
opt_prob.addConGroup(func_name, size,
wrt=dv_names,
jac=jacs, linear=linear,
lower=lower, upper=upper)
elif sys is not None:
dv_names = []
for dv_name in variables['dv'].keys():
dv_id = variables['dv'][dv_name]['ID']
if dv_id in sys.vec['u']:
dv_names.append(dv_name)
opt_prob.addConGroup(func_name, size,
wrt=dv_names,
lower=lower, upper=upper)
else:
opt_prob.addConGroup(func_name, size,
lower=lower, upper=upper)
if options is None:
options = {}
opt = Optimizer(optimizer, options=options)
opt.setOption('Iterations limit', int(1e6))
#opt.setOption('Verify level', 3)
sol = opt(opt_prob, sens=self.sens_func, storeHistory='hist.hst')
print sol
try:
exit_status = sol.optInform['value']
self.exit_flag = 1
if exit_status > 2: # bad
self.exit_flag = 0
except KeyError: #nothing is here, so something bad happened!
self.exit_flag = 0
sens = None
if sens == 'user':
sens = sensfunc
if sens == 'matrix-free':
sens = [objgrad, jprod, jtprod]
# Instantiate Optimization Problem
optProb = Optimization('Rosenbrock function', objfunc)
optProb.addVarGroup('xvars',
2,
'c',
value=[3, -3],
lower=-5.12,
upper=5.12,
scale=[1.0, 1.0])
optProb.finalizeDesignVariables()
if constrained:
optProb.addCon('con', upper=0, scale=1.0)
optProb.addObj('obj')
# Create optimizer
opt = OPT(args.opt, options=optOptions)
if testHist == 'no':
# Just run a normal run
sol = opt(optProb, sens=sens, sensMode=sensMode)
# print(sol.fStar)
print(sol)
else:
# First call just does 10 iterations
if args.opt.lower() == 'snopt':
opt.setOption('Major iterations limit', 10)
def run(self, problem):
"""pyOpt execution. Note that pyOpt controls the execution, and the
individual optimizers (i.e., SNOPT) control the iteration.
Args
----
problem : `Problem`
Our parent `Problem`.
"""
self.pyopt_solution = None
rel = problem.root._probdata.relevance
# Metadata Setup
self.metadata = create_local_meta(None, self.options['optimizer'])
self.iter_count = 0
update_local_meta(self.metadata, (self.iter_count, ))
# Initial Run
with problem.root._dircontext:
problem.root.solve_nonlinear(metadata=self.metadata)
opt_prob = Optimization(self.options['title'], self._objfunc)
# Add all parameters
param_meta = self.get_desvar_metadata()
self.indep_list = indep_list = list(param_meta)
param_vals = self.get_desvars()
for name, meta in iteritems(param_meta):
opt_prob.addVarGroup(name,
meta['size'],
type='c',
value=param_vals[name],
lower=meta['lower'],
upper=meta['upper'])
opt_prob.finalizeDesignVariables()
# Figure out parameter subsparsity for paramcomp index connections.
# sub_param_conns is empty unless there are some index conns.
# full_param_conns gets filled with the connections to the entire
# parameter so that those params can be filtered out of the sparse
# set if the full path is also relevant
sub_param_conns = {}
full_param_conns = {}
for name in indep_list:
pathname = problem.root.unknowns.metadata(name)['pathname']
sub_param_conns[name] = {}
full_param_conns[name] = set()
for target, info in iteritems(problem.root.connections):
src, indices = info
if src == pathname:
if indices is not None:
# Need to map the connection indices onto the desvar
# indices if both are declared.
dv_idx = param_meta[name].get('indices')
indices = set(indices)
if dv_idx is not None:
indices.intersection_update(dv_idx)
ldv_idx = list(dv_idx)
mapped_idx = [
ldv_idx.index(item) for item in indices
]
sub_param_conns[name][target] = mapped_idx
else:
sub_param_conns[name][target] = indices
else:
full_param_conns[name].add(target)
# Add all objectives
objs = self.get_objectives()
self.quantities = list(objs)
self.sparsity = OrderedDict()
self.sub_sparsity = OrderedDict()
for name in objs:
opt_prob.addObj(name)
self.sparsity[name] = self.indep_list
# Calculate and save gradient for any linear constraints.
lcons = self.get_constraints(lintype='linear').keys()
self._problem = problem
if len(lcons) > 0:
self.lin_jacs = self.calc_gradient(indep_list,
lcons,
return_format='dict')
#print("Linear Gradient")
#print(self.lin_jacs)
# Add all equality constraints
econs = self.get_constraints(ctype='eq', lintype='nonlinear')
con_meta = self.get_constraint_metadata()
self.quantities += list(econs)
self.active_tols = {}
for name in self.get_constraints(ctype='eq'):
meta = con_meta[name]
size = meta['size']
lower = upper = meta['equals']
# Sparsify Jacobian via relevance
rels = rel.relevant[name]
wrt = rels.intersection(indep_list)
self.sparsity[name] = wrt
if meta['linear']:
opt_prob.addConGroup(name,
size,
lower=lower,
upper=upper,
linear=True,
wrt=wrt,
jac=self.lin_jacs[name])
else:
jac = self._build_sparse(name, wrt, size, param_vals,
sub_param_conns, full_param_conns,
rels)
opt_prob.addConGroup(name,
size,
lower=lower,
upper=upper,
wrt=wrt,
jac=jac)
active_tol = meta.get('active_tol')
if active_tol:
self.active_tols[name] = active_tol
# Add all inequality constraints
incons = self.get_constraints(ctype='ineq', lintype='nonlinear')
self.quantities += list(incons)
for name in self.get_constraints(ctype='ineq'):
meta = con_meta[name]
size = meta['size']
# Bounds - double sided is supported
lower = meta['lower']
upper = meta['upper']
# Sparsify Jacobian via relevance
rels = rel.relevant[name]
wrt = rels.intersection(indep_list)
self.sparsity[name] = wrt
if meta['linear']:
opt_prob.addConGroup(name,
size,
upper=upper,
lower=lower,
linear=True,
wrt=wrt,
jac=self.lin_jacs[name])
else:
jac = self._build_sparse(name, wrt, size, param_vals,
sub_param_conns, full_param_conns,
rels)
opt_prob.addConGroup(name,
size,
upper=upper,
lower=lower,
wrt=wrt,
jac=jac)
active_tol = meta.get('active_tol')
if active_tol is not None:
self.active_tols[name] = active_tol
# Instantiate the requested optimizer
optimizer = self.options['optimizer']
try:
_tmp = __import__('pyoptsparse', globals(), locals(), [optimizer],
0)
opt = getattr(_tmp, optimizer)()
except ImportError:
msg = "Optimizer %s is not available in this installation." % \
optimizer
raise ImportError(msg)
#Set optimization options
for option, value in self.opt_settings.items():
opt.setOption(option, value)
self.opt_prob = opt_prob
# Execute the optimization problem
if self.options['gradient method'] == 'pyopt_fd':
# Use pyOpt's internal finite difference
fd_step = problem.root.deriv_options['step_size']
sol = opt(opt_prob,
sens='FD',
sensStep=fd_step,
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
elif self.options['gradient method'] == 'snopt_fd':
if self.options['optimizer'] == 'SNOPT':
# Use SNOPT's internal finite difference
fd_step = problem.root.deriv_options['step_size']
sol = opt(opt_prob,
sens=None,
sensStep=fd_step,
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
else:
msg = "SNOPT's internal finite difference can only be used with SNOPT"
raise Exception(msg)
else:
# Use OpenMDAO's differentiator for the gradient
sol = opt(opt_prob,
sens=self._gradfunc,
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
self._problem = None
# Print results
if self.options['print_results']:
print(sol)
# Pull optimal parameters back into framework and re-run, so that
# framework is left in the right final state
dv_dict = sol.getDVs()
for name in indep_list:
val = dv_dict[name]
self.set_desvar(name, val)
with self.root._dircontext:
self.root.solve_nonlinear(metadata=self.metadata)
# Save the most recent solution.
self.pyopt_solution = sol
try:
exit_status = sol.optInform['value']
self.exit_flag = 1
if exit_status > 2: # bad
self.exit_flag = 0
except KeyError: #nothing is here, so something bad happened!
self.exit_flag = 0
def run(self):
"""
Excute pyOptsparse.
Note that pyOpt controls the execution, and the individual optimizers
(e.g., SNOPT) control the iteration.
Returns
-------
boolean
Failure flag; True if failed to converge, False is successful.
"""
problem = self._problem
model = problem.model
relevant = model._relevant
self.pyopt_solution = None
self._total_jac = None
self.iter_count = 0
fwd = problem._mode == 'fwd'
optimizer = self.options['optimizer']
# Only need initial run if we have linear constraints or if we are using an optimizer that
# doesn't perform one initially.
con_meta = self._cons
model_ran = False
if optimizer in run_required or np.any([con['linear'] for con in itervalues(self._cons)]):
with RecordingDebugging(self._get_name(), self.iter_count, self) as rec:
# Initial Run
model.run_solve_nonlinear()
rec.abs = 0.0
rec.rel = 0.0
model_ran = True
self.iter_count += 1
# compute dynamic simul deriv coloring or just sparsity if option is set
if coloring_mod._use_sparsity:
if self.options['dynamic_simul_derivs']:
coloring_mod.dynamic_simul_coloring(self, run_model=not model_ran,
do_sparsity=True)
elif self.options['dynamic_derivs_sparsity']:
coloring_mod.dynamic_sparsity(self)
opt_prob = Optimization(self.options['title'], self._objfunc)
# Add all design variables
param_meta = self._designvars
self._indep_list = indep_list = list(param_meta)
param_vals = self.get_design_var_values()
for name, meta in iteritems(param_meta):
opt_prob.addVarGroup(name, meta['size'], type='c',
value=param_vals[name],
lower=meta['lower'], upper=meta['upper'])
opt_prob.finalizeDesignVariables()
# Add all objectives
objs = self.get_objective_values()
for name in objs:
opt_prob.addObj(name)
self._quantities.append(name)
# Calculate and save derivatives for any linear constraints.
lcons = [key for (key, con) in iteritems(con_meta) if con['linear']]
if len(lcons) > 0:
_lin_jacs = self._compute_totals(of=lcons, wrt=indep_list, return_format='dict')
# convert all of our linear constraint jacs to COO format. Otherwise pyoptsparse will
# do it for us and we'll end up with a fully dense COO matrix and very slow evaluation
# of linear constraints!
to_remove = []
for jacdct in itervalues(_lin_jacs):
for n, subjac in iteritems(jacdct):
if isinstance(subjac, np.ndarray):
# we can safely use coo_matrix to automatically convert the ndarray
# since our linear constraint jacs are constant, so zeros won't become
# nonzero during the optimization.
mat = coo_matrix(subjac)
if mat.row.size > 0:
# convert to 'coo' format here to avoid an emphatic warning
# by pyoptsparse.
jacdct[n] = {'coo': [mat.row, mat.col, mat.data], 'shape': mat.shape}
# Add all equality constraints
for name, meta in iteritems(con_meta):
if meta['equals'] is None:
continue
size = meta['size']
lower = upper = meta['equals']
if fwd:
wrt = [v for v in indep_list if name in relevant[v]]
else:
rels = relevant[name]
wrt = [v for v in indep_list if v in rels]
if meta['linear']:
jac = {w: _lin_jacs[name][w] for w in wrt}
opt_prob.addConGroup(name, size, lower=lower, upper=upper,
linear=True, wrt=wrt, jac=jac)
else:
if name in self._res_jacs:
resjac = self._res_jacs[name]
jac = {n: resjac[n] for n in wrt}
else:
jac = None
opt_prob.addConGroup(name, size, lower=lower, upper=upper, wrt=wrt, jac=jac)
self._quantities.append(name)
# Add all inequality constraints
for name, meta in iteritems(con_meta):
if meta['equals'] is not None:
continue
size = meta['size']
# Bounds - double sided is supported
lower = meta['lower']
upper = meta['upper']
if fwd:
wrt = [v for v in indep_list if name in relevant[v]]
else:
rels = relevant[name]
wrt = [v for v in indep_list if v in rels]
if meta['linear']:
jac = {w: _lin_jacs[name][w] for w in wrt}
opt_prob.addConGroup(name, size, upper=upper, lower=lower,
linear=True, wrt=wrt, jac=jac)
else:
if name in self._res_jacs:
resjac = self._res_jacs[name]
jac = {n: resjac[n] for n in wrt}
else:
jac = None
opt_prob.addConGroup(name, size, upper=upper, lower=lower, wrt=wrt, jac=jac)
self._quantities.append(name)
# Instantiate the requested optimizer
try:
_tmp = __import__('pyoptsparse', globals(), locals(), [optimizer], 0)
opt = getattr(_tmp, optimizer)()
except Exception as err:
# Change whatever pyopt gives us to an ImportError, give it a readable message,
# but raise with the original traceback.
msg = "Optimizer %s is not available in this installation." % optimizer
reraise(ImportError, ImportError(msg), sys.exc_info()[2])
# Set optimization options
for option, value in self.opt_settings.items():
opt.setOption(option, value)
# Execute the optimization problem
if self.options['gradient method'] == 'pyopt_fd':
# Use pyOpt's internal finite difference
# TODO: Need to get this from OpenMDAO
# fd_step = problem.root.deriv_options['step_size']
fd_step = 1e-6
sol = opt(opt_prob, sens='FD', sensStep=fd_step, storeHistory=self.hist_file,
hotStart=self.hotstart_file)
elif self.options['gradient method'] == 'snopt_fd':
if self.options['optimizer'] == 'SNOPT':
# Use SNOPT's internal finite difference
# TODO: Need to get this from OpenMDAO
# fd_step = problem.root.deriv_options['step_size']
fd_step = 1e-6
sol = opt(opt_prob, sens=None, sensStep=fd_step, storeHistory=self.hist_file,
hotStart=self.hotstart_file)
else:
msg = "SNOPT's internal finite difference can only be used with SNOPT"
raise Exception(msg)
else:
# Use OpenMDAO's differentiator for the gradient
sol = opt(opt_prob, sens=self._gradfunc, storeHistory=self.hist_file,
hotStart=self.hotstart_file)
# Print results
if self.options['print_results']:
print(sol)
# Pull optimal parameters back into framework and re-run, so that
# framework is left in the right final state
dv_dict = sol.getDVs()
for name in indep_list:
self.set_design_var(name, dv_dict[name])
with RecordingDebugging(self._get_name(), self.iter_count, self) as rec:
model.run_solve_nonlinear()
rec.abs = 0.0
rec.rel = 0.0
self.iter_count += 1
# Save the most recent solution.
self.pyopt_solution = sol
try:
exit_status = sol.optInform['value']
self.fail = False
# These are various failed statuses.
if exit_status > 2:
self.fail = True
except KeyError:
# optimizers other than pySNOPT may not populate this dict
pass
return self.fail
def run(self):
"""
Excute pyOptsparse.
Note that pyOpt controls the execution, and the individual optimizers
(e.g., SNOPT) control the iteration.
Returns
-------
boolean
Failure flag; True if failed to converge, False is successful.
"""
problem = self._problem()
model = problem.model
relevant = model._relevant
self.pyopt_solution = None
self._total_jac = None
self.iter_count = 0
fwd = problem._mode == 'fwd'
optimizer = self.options['optimizer']
self._quantities = []
self._check_for_missing_objective()
# Only need initial run if we have linear constraints or if we are using an optimizer that
# doesn't perform one initially.
con_meta = self._cons
model_ran = False
if optimizer in run_required or np.any(
[con['linear'] for con in self._cons.values()]):
with RecordingDebugging(self._get_name(), self.iter_count,
self) as rec:
# Initial Run
model.run_solve_nonlinear()
rec.abs = 0.0
rec.rel = 0.0
model_ran = True
self.iter_count += 1
# compute dynamic simul deriv coloring or just sparsity if option is set
if c_mod._use_total_sparsity:
coloring = None
if self._coloring_info['coloring'] is None and self._coloring_info[
'dynamic']:
coloring = c_mod.dynamic_total_coloring(
self,
run_model=not model_ran,
fname=self._get_total_coloring_fname())
if coloring is not None:
# if the improvement wasn't large enough, don't use coloring
pct = coloring._solves_info()[-1]
info = self._coloring_info
if info['min_improve_pct'] > pct:
info['coloring'] = info['static'] = None
simple_warning(
"%s: Coloring was deactivated. Improvement of %.1f%% was less "
"than min allowed (%.1f%%)." %
(self.msginfo, pct, info['min_improve_pct']))
comm = None if isinstance(problem.comm, FakeComm) else problem.comm
opt_prob = Optimization(self.options['title'],
weak_method_wrapper(self, '_objfunc'),
comm=comm)
# Add all design variables
param_meta = self._designvars
self._indep_list = indep_list = list(param_meta)
param_vals = self.get_design_var_values()
for name, meta in param_meta.items():
opt_prob.addVarGroup(name,
meta['size'],
type='c',
value=param_vals[name],
lower=meta['lower'],
upper=meta['upper'])
opt_prob.finalizeDesignVariables()
# Add all objectives
objs = self.get_objective_values()
for name in objs:
opt_prob.addObj(name)
self._quantities.append(name)
# Calculate and save derivatives for any linear constraints.
lcons = [key for (key, con) in con_meta.items() if con['linear']]
if len(lcons) > 0:
_lin_jacs = self._compute_totals(of=lcons,
wrt=indep_list,
return_format='dict')
# convert all of our linear constraint jacs to COO format. Otherwise pyoptsparse will
# do it for us and we'll end up with a fully dense COO matrix and very slow evaluation
# of linear constraints!
to_remove = []
for jacdct in _lin_jacs.values():
for n, subjac in jacdct.items():
if isinstance(subjac, np.ndarray):
# we can safely use coo_matrix to automatically convert the ndarray
# since our linear constraint jacs are constant, so zeros won't become
# nonzero during the optimization.
mat = coo_matrix(subjac)
if mat.row.size > 0:
# convert to 'coo' format here to avoid an emphatic warning
# by pyoptsparse.
jacdct[n] = {
'coo': [mat.row, mat.col, mat.data],
'shape': mat.shape
}
# Add all equality constraints
for name, meta in con_meta.items():
if meta['equals'] is None:
continue
size = meta['size']
lower = upper = meta['equals']
if fwd:
wrt = [v for v in indep_list if name in relevant[v]]
else:
rels = relevant[name]
wrt = [v for v in indep_list if v in rels]
if meta['linear']:
jac = {w: _lin_jacs[name][w] for w in wrt}
opt_prob.addConGroup(name,
size,
lower=lower,
upper=upper,
linear=True,
wrt=wrt,
jac=jac)
else:
if name in self._res_jacs:
resjac = self._res_jacs[name]
jac = {n: resjac[n] for n in wrt}
else:
jac = None
opt_prob.addConGroup(name,
size,
lower=lower,
upper=upper,
wrt=wrt,
jac=jac)
self._quantities.append(name)
# Add all inequality constraints
for name, meta in con_meta.items():
if meta['equals'] is not None:
continue
size = meta['size']
# Bounds - double sided is supported
lower = meta['lower']
upper = meta['upper']
if fwd:
wrt = [v for v in indep_list if name in relevant[v]]
else:
rels = relevant[name]
wrt = [v for v in indep_list if v in rels]
if meta['linear']:
jac = {w: _lin_jacs[name][w] for w in wrt}
opt_prob.addConGroup(name,
size,
upper=upper,
lower=lower,
linear=True,
wrt=wrt,
jac=jac)
else:
if name in self._res_jacs:
resjac = self._res_jacs[name]
jac = {n: resjac[n] for n in wrt}
else:
jac = None
opt_prob.addConGroup(name,
size,
upper=upper,
lower=lower,
wrt=wrt,
jac=jac)
self._quantities.append(name)
# Instantiate the requested optimizer
try:
_tmp = __import__('pyoptsparse', globals(), locals(), [optimizer],
0)
opt = getattr(_tmp, optimizer)()
except Exception as err:
# Change whatever pyopt gives us to an ImportError, give it a readable message,
# but raise with the original traceback.
msg = "Optimizer %s is not available in this installation." % optimizer
raise ImportError(msg)
# Process any default optimizer-specific settings.
if optimizer in DEFAULT_OPT_SETTINGS:
for name, value in DEFAULT_OPT_SETTINGS[optimizer].items():
if name not in self.opt_settings:
self.opt_settings[name] = value
# Set optimization options
for option, value in self.opt_settings.items():
opt.setOption(option, value)
# Execute the optimization problem
if self.options['gradient method'] == 'pyopt_fd':
# Use pyOpt's internal finite difference
# TODO: Need to get this from OpenMDAO
# fd_step = problem.model.deriv_options['step_size']
fd_step = 1e-6
sol = opt(opt_prob,
sens='FD',
sensStep=fd_step,
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
elif self.options['gradient method'] == 'snopt_fd':
if self.options['optimizer'] == 'SNOPT':
# Use SNOPT's internal finite difference
# TODO: Need to get this from OpenMDAO
# fd_step = problem.model.deriv_options['step_size']
fd_step = 1e-6
sol = opt(opt_prob,
sens=None,
sensStep=fd_step,
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
else:
raise Exception(
"SNOPT's internal finite difference can only be used with SNOPT"
)
else:
# Use OpenMDAO's differentiator for the gradient
sol = opt(opt_prob,
sens=weak_method_wrapper(self, '_gradfunc'),
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
# Print results
if self.options['print_results']:
print(sol)
# Pull optimal parameters back into framework and re-run, so that
# framework is left in the right final state
dv_dict = sol.getDVs()
for name in indep_list:
self.set_design_var(name, dv_dict[name])
with RecordingDebugging(self._get_name(), self.iter_count,
self) as rec:
model.run_solve_nonlinear()
rec.abs = 0.0
rec.rel = 0.0
self.iter_count += 1
# Save the most recent solution.
self.pyopt_solution = sol
try:
exit_status = sol.optInform['value']
self.fail = False
# These are various failed statuses.
if optimizer == 'IPOPT':
if exit_status not in {0, 1}:
self.fail = True
elif exit_status > 2:
self.fail = True
except KeyError:
# optimizers other than pySNOPT may not populate this dict
pass
# revert signal handler to cached version
sigusr = self.options['user_teriminate_signal']
if sigusr is not None:
signal.signal(sigusr, self._signal_cache)
self._signal_cache = None # to prevent memory leak test from failing
return self.fail
def run(self):
"""
Excute pyOptsparse.
Note that pyOpt controls the execution, and the individual optimizers
(e.g., SNOPT) control the iteration.
Returns
-------
boolean
Failure flag; True if failed to converge, False is successful.
"""
problem = self._problem
model = problem.model
relevant = model._relevant
self.pyopt_solution = None
self._total_jac = None
self.iter_count = 0
fwd = problem._mode == 'fwd'
optimizer = self.options['optimizer']
# Only need initial run if we have linear constraints or if we are using an optimizer that
# doesn't perform one initially.
con_meta = self._cons
if optimizer in run_required or np.any([con['linear'] for con in itervalues(self._cons)]):
with RecordingDebugging(optimizer, self.iter_count, self) as rec:
# Initial Run
model._solve_nonlinear()
rec.abs = 0.0
rec.rel = 0.0
self.iter_count += 1
# compute dynamic simul deriv coloring or just sparsity if option is set
if coloring_mod._use_sparsity:
if self.options['dynamic_simul_derivs']:
coloring_mod.dynamic_simul_coloring(self, do_sparsity=True)
elif self.options['dynamic_derivs_sparsity']:
coloring_mod.dynamic_sparsity(self)
opt_prob = Optimization(self.options['title'], self._objfunc)
# Add all design variables
param_meta = self._designvars
self._indep_list = indep_list = list(param_meta)
param_vals = self.get_design_var_values()
for name, meta in iteritems(param_meta):
opt_prob.addVarGroup(name, meta['size'], type='c',
value=param_vals[name],
lower=meta['lower'], upper=meta['upper'])
opt_prob.finalizeDesignVariables()
# Add all objectives
objs = self.get_objective_values()
for name in objs:
opt_prob.addObj(name)
self._quantities.append(name)
# Calculate and save derivatives for any linear constraints.
lcons = [key for (key, con) in iteritems(con_meta) if con['linear']]
if len(lcons) > 0:
_lin_jacs = self._compute_totals(of=lcons, wrt=indep_list, return_format='dict')
# convert all of our linear constraint jacs to COO format. Otherwise pyoptsparse will
# do it for us and we'll end up with a fully dense COO matrix and very slow evaluation
# of linear constraints!
to_remove = []
for oname, jacdct in iteritems(_lin_jacs):
for n, subjac in iteritems(jacdct):
if isinstance(subjac, np.ndarray):
# we can safely use coo_matrix to automatically convert the ndarray
# since our linear constraint jacs are constant, so zeros won't become
# nonzero during the optimization.
mat = coo_matrix(subjac)
if mat.row.size > 0:
# convert to 'coo' format here to avoid an emphatic warning
# by pyoptsparse.
jacdct[n] = {'coo': [mat.row, mat.col, mat.data], 'shape': mat.shape}
# Add all equality constraints
for name, meta in iteritems(con_meta):
if meta['equals'] is None:
continue
size = meta['size']
lower = upper = meta['equals']
if fwd:
wrt = [v for v in indep_list if name in relevant[v]]
else:
rels = relevant[name]
wrt = [v for v in indep_list if v in rels]
if meta['linear']:
jac = {w: _lin_jacs[name][w] for w in wrt}
opt_prob.addConGroup(name, size, lower=lower, upper=upper,
linear=True, wrt=wrt, jac=jac)
else:
if name in self._res_jacs:
resjac = self._res_jacs[name]
jac = {n: resjac[n] for n in wrt}
else:
jac = None
opt_prob.addConGroup(name, size, lower=lower, upper=upper, wrt=wrt, jac=jac)
self._quantities.append(name)
# Add all inequality constraints
for name, meta in iteritems(con_meta):
if meta['equals'] is not None:
continue
size = meta['size']
# Bounds - double sided is supported
lower = meta['lower']
upper = meta['upper']
if fwd:
wrt = [v for v in indep_list if name in relevant[v]]
else:
rels = relevant[name]
wrt = [v for v in indep_list if v in rels]
if meta['linear']:
jac = {w: _lin_jacs[name][w] for w in wrt}
opt_prob.addConGroup(name, size, upper=upper, lower=lower,
linear=True, wrt=wrt, jac=jac)
else:
if name in self._res_jacs:
resjac = self._res_jacs[name]
jac = {n: resjac[n] for n in wrt}
else:
jac = None
opt_prob.addConGroup(name, size, upper=upper, lower=lower, wrt=wrt, jac=jac)
self._quantities.append(name)
# Instantiate the requested optimizer
try:
_tmp = __import__('pyoptsparse', globals(), locals(), [optimizer], 0)
opt = getattr(_tmp, optimizer)()
except Exception as err:
# Change whatever pyopt gives us to an ImportError, give it a readable message,
# but raise with the original traceback.
msg = "Optimizer %s is not available in this installation." % optimizer
reraise(ImportError, ImportError(msg), sys.exc_info()[2])
# Set optimization options
for option, value in self.opt_settings.items():
opt.setOption(option, value)
# Execute the optimization problem
if self.options['gradient method'] == 'pyopt_fd':
# Use pyOpt's internal finite difference
# TODO: Need to get this from OpenMDAO
# fd_step = problem.root.deriv_options['step_size']
fd_step = 1e-6
sol = opt(opt_prob, sens='FD', sensStep=fd_step, storeHistory=self.hist_file,
hotStart=self.hotstart_file)
elif self.options['gradient method'] == 'snopt_fd':
if self.options['optimizer'] == 'SNOPT':
# Use SNOPT's internal finite difference
# TODO: Need to get this from OpenMDAO
# fd_step = problem.root.deriv_options['step_size']
fd_step = 1e-6
sol = opt(opt_prob, sens=None, sensStep=fd_step, storeHistory=self.hist_file,
hotStart=self.hotstart_file)
else:
msg = "SNOPT's internal finite difference can only be used with SNOPT"
raise Exception(msg)
else:
# Use OpenMDAO's differentiator for the gradient
sol = opt(opt_prob, sens=self._gradfunc, storeHistory=self.hist_file,
hotStart=self.hotstart_file)
# Print results
if self.options['print_results']:
print(sol)
# Pull optimal parameters back into framework and re-run, so that
# framework is left in the right final state
dv_dict = sol.getDVs()
for name in indep_list:
val = dv_dict[name]
self.set_design_var(name, val)
with RecordingDebugging(self.options['optimizer'], self.iter_count, self) as rec:
model._solve_nonlinear()
rec.abs = 0.0
rec.rel = 0.0
self.iter_count += 1
# Save the most recent solution.
self.pyopt_solution = sol
try:
exit_status = sol.optInform['value']
self.fail = False
# These are various failed statuses.
if exit_status > 2:
self.fail = True
except KeyError:
# optimizers other than pySNOPT may not populate this dict
pass
return self.fail
def run(self, problem):
"""pyOpt execution. Note that pyOpt controls the execution, and the
individual optimizers (i.e., SNOPT) control the iteration.
Args
----
problem : `Problem`
Our parent `Problem`.
"""
self.pyopt_solution = None
rel = problem.root._probdata.relevance
# Metadata Setup
self.metadata = create_local_meta(None, self.options['optimizer'])
self.iter_count = 0
update_local_meta(self.metadata, (self.iter_count,))
# Initial Run
with problem.root._dircontext:
problem.root.solve_nonlinear(metadata=self.metadata)
opt_prob = Optimization(self.options['title'], self._objfunc)
# Add all parameters
param_meta = self.get_desvar_metadata()
self.indep_list = indep_list = list(param_meta)
param_vals = self.get_desvars()
for name, meta in iteritems(param_meta):
opt_prob.addVarGroup(name, meta['size'], type='c',
value=param_vals[name],
lower=meta['lower'], upper=meta['upper'])
opt_prob.finalizeDesignVariables()
# Figure out parameter subsparsity for paramcomp index connections.
# sub_param_conns is empty unless there are some index conns.
# full_param_conns gets filled with the connections to the entire
# parameter so that those params can be filtered out of the sparse
# set if the full path is also relevant
sub_param_conns = {}
full_param_conns = {}
for name in indep_list:
pathname = problem.root.unknowns.metadata(name)['pathname']
sub_param_conns[name] = {}
full_param_conns[name] = set()
for target, info in iteritems(problem.root.connections):
src, indices = info
if src == pathname:
if indices is not None:
# Need to map the connection indices onto the desvar
# indices if both are declared.
dv_idx = param_meta[name].get('indices')
indices = set(indices)
if dv_idx is not None:
indices.intersection_update(dv_idx)
ldv_idx = list(dv_idx)
mapped_idx = [ldv_idx.index(item) for item in indices]
sub_param_conns[name][target] = mapped_idx
else:
sub_param_conns[name][target] = indices
else:
full_param_conns[name].add(target)
# Add all objectives
objs = self.get_objectives()
self.quantities = list(objs)
self.sparsity = OrderedDict()
self.sub_sparsity = OrderedDict()
for name in objs:
opt_prob.addObj(name)
self.sparsity[name] = self.indep_list
# Calculate and save gradient for any linear constraints.
lcons = self.get_constraints(lintype='linear').keys()
if len(lcons) > 0:
self.lin_jacs = problem.calc_gradient(indep_list, lcons,
return_format='dict')
#print("Linear Gradient")
#print(self.lin_jacs)
# Add all equality constraints
econs = self.get_constraints(ctype='eq', lintype='nonlinear')
con_meta = self.get_constraint_metadata()
self.quantities += list(econs)
for name in self.get_constraints(ctype='eq'):
meta = con_meta[name]
size = meta['size']
lower = upper = meta['equals']
# Sparsify Jacobian via relevance
rels = rel.relevant[name]
wrt = rels.intersection(indep_list)
self.sparsity[name] = wrt
if meta['linear']:
opt_prob.addConGroup(name, size, lower=lower, upper=upper,
linear=True, wrt=wrt,
jac=self.lin_jacs[name])
else:
jac = self._build_sparse(name, wrt, size, param_vals,
sub_param_conns, full_param_conns, rels)
opt_prob.addConGroup(name, size, lower=lower, upper=upper,
wrt=wrt, jac=jac)
# Add all inequality constraints
incons = self.get_constraints(ctype='ineq', lintype='nonlinear')
self.quantities += list(incons)
for name in self.get_constraints(ctype='ineq'):
meta = con_meta[name]
size = meta['size']
# Bounds - double sided is supported
lower = meta['lower']
upper = meta['upper']
# Sparsify Jacobian via relevance
rels = rel.relevant[name]
wrt = rels.intersection(indep_list)
self.sparsity[name] = wrt
if meta['linear']:
opt_prob.addConGroup(name, size, upper=upper, lower=lower,
linear=True, wrt=wrt,
jac=self.lin_jacs[name])
else:
jac = self._build_sparse(name, wrt, size, param_vals,
sub_param_conns, full_param_conns, rels)
opt_prob.addConGroup(name, size, upper=upper, lower=lower,
wrt=wrt, jac=jac)
# Instantiate the requested optimizer
optimizer = self.options['optimizer']
try:
exec('from pyoptsparse import %s' % optimizer)
except ImportError:
msg = "Optimizer %s is not available in this installation." % \
optimizer
raise ImportError(msg)
optname = vars()[optimizer]
opt = optname()
#Set optimization options
for option, value in self.opt_settings.items():
opt.setOption(option, value)
self._problem = problem
# Execute the optimization problem
if self.options['pyopt_diff']:
# Use pyOpt's internal finite difference
fd_step = problem.root.fd_options['step_size']
sol = opt(opt_prob, sens='FD', sensStep=fd_step, storeHistory=self.hist_file)
else:
# Use OpenMDAO's differentiator for the gradient
sol = opt(opt_prob, sens=self._gradfunc, storeHistory=self.hist_file)
self._problem = None
# Print results
if self.options['print_results']:
print(sol)
# Pull optimal parameters back into framework and re-run, so that
# framework is left in the right final state
dv_dict = sol.getDVs()
for name in indep_list:
val = dv_dict[name]
self.set_desvar(name, val)
with self.root._dircontext:
self.root.solve_nonlinear(metadata=self.metadata)
# Save the most recent solution.
self.pyopt_solution = sol
try:
exit_status = sol.optInform['value']
self.exit_flag = 1
if exit_status > 2: # bad
self.exit_flag = 0
except KeyError: #nothing is here, so something bad happened!
self.exit_flag = 0
def run(self):
"""
Excute pyOptsparse.
Note that pyOpt controls the execution, and the individual optimizers
(e.g., SNOPT) control the iteration.
Returns
-------
boolean
Failure flag; True if failed to converge, False is successful.
"""
problem = self._problem
model = problem.model
relevant = model._relevant
self.pyopt_solution = None
self.iter_count = 0
fwd = problem._mode == 'fwd'
# Metadata Setup
self.metadata = create_local_meta(self.options['optimizer'])
with Recording(self.options['optimizer'], self.iter_count,
self) as rec:
# Initial Run
model._solve_nonlinear()
rec.abs = 0.0
rec.rel = 0.0
self.iter_count += 1
opt_prob = Optimization(self.options['title'], self._objfunc)
# Add all design variables
param_meta = self._designvars
self._indep_list = indep_list = list(param_meta)
param_vals = self.get_design_var_values()
for name, meta in iteritems(param_meta):
opt_prob.addVarGroup(name,
meta['size'],
type='c',
value=param_vals[name],
lower=meta['lower'],
upper=meta['upper'])
opt_prob.finalizeDesignVariables()
# Add all objectives
objs = self.get_objective_values()
for name in objs:
opt_prob.addObj(name)
self._quantities.append(name)
# Calculate and save derivatives for any linear constraints.
con_meta = self._cons
lcons = [
key for (key, con) in iteritems(con_meta) if con['linear'] is True
]
if len(lcons) > 0:
_lin_jacs = problem._compute_totals(of=lcons,
wrt=indep_list,
return_format='dict')
# Add all equality constraints
self.active_tols = {}
eqcons = OrderedDict((key, con) for (key, con) in iteritems(con_meta)
if con['equals'] is not None)
for name, meta in iteritems(eqcons):
size = meta['size']
lower = upper = meta['equals']
if fwd:
wrt = [v for v in indep_list if name in relevant[v]]
else:
rels = relevant[name]
wrt = [v for v in indep_list if v in rels]
if meta['linear']:
opt_prob.addConGroup(name,
size,
lower=lower,
upper=upper,
linear=True,
wrt=wrt,
jac=_lin_jacs[name])
else:
opt_prob.addConGroup(name,
size,
lower=lower,
upper=upper,
wrt=wrt)
self._quantities.append(name)
# Add all inequality constraints
iqcons = OrderedDict((key, con) for (key, con) in iteritems(con_meta)
if con['equals'] is None)
for name, meta in iteritems(iqcons):
size = meta['size']
# Bounds - double sided is supported
lower = meta['lower']
upper = meta['upper']
if fwd:
wrt = [v for v in indep_list if name in relevant[v]]
else:
rels = relevant[name]
wrt = [v for v in indep_list if v in rels]
if meta['linear']:
opt_prob.addConGroup(name,
size,
upper=upper,
lower=lower,
linear=True,
wrt=wrt,
jac=_lin_jacs[name])
else:
opt_prob.addConGroup(name,
size,
upper=upper,
lower=lower,
wrt=wrt)
self._quantities.append(name)
# Instantiate the requested optimizer
optimizer = self.options['optimizer']
try:
_tmp = __import__('pyoptsparse', globals(), locals(), [optimizer],
0)
opt = getattr(_tmp, optimizer)()
except ImportError:
msg = "Optimizer %s is not available in this installation." % optimizer
raise ImportError(msg)
# Set optimization options
for option, value in self.opt_settings.items():
opt.setOption(option, value)
self.opt_prob = opt_prob
self.opt = opt
# Execute the optimization problem
if self.options['gradient method'] == 'pyopt_fd':
# Use pyOpt's internal finite difference
# TODO: Need to get this from OpenMDAO
# fd_step = problem.root.deriv_options['step_size']
fd_step = 1e-6
sol = opt(opt_prob,
sens='FD',
sensStep=fd_step,
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
elif self.options['gradient method'] == 'snopt_fd':
if self.options['optimizer'] == 'SNOPT':
# Use SNOPT's internal finite difference
# TODO: Need to get this from OpenMDAO
# fd_step = problem.root.deriv_options['step_size']
fd_step = 1e-6
sol = opt(opt_prob,
sens=None,
sensStep=fd_step,
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
else:
msg = "SNOPT's internal finite difference can only be used with SNOPT"
raise Exception(msg)
else:
# Use OpenMDAO's differentiator for the gradient
sol = opt(opt_prob,
sens=self._gradfunc,
storeHistory=self.hist_file,
hotStart=self.hotstart_file)
# Print results
if self.options['print_results']:
print(sol)
# Pull optimal parameters back into framework and re-run, so that
# framework is left in the right final state
dv_dict = sol.getDVs()
for name in indep_list:
val = dv_dict[name]
self.set_design_var(name, val)
with Recording(self.options['optimizer'], self.iter_count,
self) as rec:
model._solve_nonlinear()
rec.abs = 0.0
rec.rel = 0.0
self.iter_count += 1
# Save the most recent solution.
self.pyopt_solution = sol
try:
exit_status = sol.optInform['value']
self.fail = False
# These are various failed statuses.
if exit_status > 2:
self.fail = True
except KeyError:
# Nothing is here, so something bad happened!
self.fail = True
return self.fail