def fit(self, data_instances, validate_data=None):
"""
Train lr model of role guest
Parameters
----------
data_instances: Table of Instance, input data
"""
LOGGER.info("Enter hetero_lr_guest fit")
# self._abnormal_detection(data_instances)
# self.check_abnormal_values(data_instances)
# self.check_abnormal_values(validate_data)
# self.header = self.get_header(data_instances)
self.prepare_fit(data_instances, validate_data)
classes = self.one_vs_rest_obj.get_data_classes(data_instances)
if with_weight(data_instances):
data_instances = scale_sample_weight(data_instances)
self.gradient_loss_operator.set_use_sample_weight()
LOGGER.debug(
f"instance weight scaled; use weighted gradient loss operator")
if len(classes) > 2:
self.need_one_vs_rest = True
self.need_call_back_loss = False
self.one_vs_rest_fit(train_data=data_instances,
validate_data=validate_data)
else:
self.need_one_vs_rest = False
self.fit_binary(data_instances, validate_data)
def fit(self, data_instances, validate_data=None):
"""
Train linR model of role guest
Parameters
----------
data_instances: Table of Instance, input data
"""
LOGGER.info("Enter hetero_linR_guest fit")
self._abnormal_detection(data_instances)
self.header = self.get_header(data_instances)
self.callback_list.on_train_begin(data_instances, validate_data)
# self.validation_strategy = self.init_validation_strategy(data_instances, validate_data)
self.cipher_operator = self.cipher.gen_paillier_cipher_operator()
use_async = False
if with_weight(data_instances):
if self.model_param.early_stop == "diff":
LOGGER.warning("input data with weight, please use 'weight_diff' for 'early_stop'.")
data_instances = scale_sample_weight(data_instances)
self.gradient_loss_operator.set_use_sample_weight()
LOGGER.debug(f"instance weight scaled; use weighted gradient loss operator")
# LOGGER.debug(f"data_instances after scale: {[v[1].weight for v in list(data_instances.collect())]}")
elif len(self.component_properties.host_party_idlist) == 1:
LOGGER.debug(f"set_use_async")
self.gradient_loss_operator.set_use_async()
use_async = True
self.transfer_variable.use_async.remote(use_async)
LOGGER.info("Generate mini-batch from input data")
self.batch_generator.initialize_batch_generator(data_instances, self.batch_size)
self.gradient_loss_operator.set_total_batch_nums(self.batch_generator.batch_nums)
self.encrypted_calculator = [EncryptModeCalculator(self.cipher_operator,
self.encrypted_mode_calculator_param.mode,
self.encrypted_mode_calculator_param.re_encrypted_rate) for _
in range(self.batch_generator.batch_nums)]
LOGGER.info("Start initialize model.")
LOGGER.info("fit_intercept:{}".format(self.init_param_obj.fit_intercept))
model_shape = self.get_features_shape(data_instances)
if not self.component_properties.is_warm_start:
w = self.initializer.init_model(model_shape, init_params=self.init_param_obj)
self.model_weights = LinearModelWeights(w, fit_intercept=self.fit_intercept, raise_overflow_error=False)
else:
self.callback_warm_start_init_iter(self.n_iter_)
while self.n_iter_ < self.max_iter:
self.callback_list.on_epoch_begin(self.n_iter_)
LOGGER.info("iter:{}".format(self.n_iter_))
# each iter will get the same batch_data_generator
batch_data_generator = self.batch_generator.generate_batch_data()
self.optimizer.set_iters(self.n_iter_)
batch_index = 0
for batch_data in batch_data_generator:
# Start gradient procedure
optim_guest_gradient = self.gradient_loss_operator.compute_gradient_procedure(
batch_data,
self.encrypted_calculator,
self.model_weights,
self.optimizer,
self.n_iter_,
batch_index
)
loss_norm = self.optimizer.loss_norm(self.model_weights)
self.gradient_loss_operator.compute_loss(batch_data, self.n_iter_, batch_index, loss_norm)
self.model_weights = self.optimizer.update_model(self.model_weights, optim_guest_gradient)
batch_index += 1
self.is_converged = self.converge_procedure.sync_converge_info(suffix=(self.n_iter_,))
LOGGER.info("iter: {}, is_converged: {}".format(self.n_iter_, self.is_converged))
self.callback_list.on_epoch_end(self.n_iter_)
self.n_iter_ += 1
if self.stop_training:
break
if self.is_converged:
break
self.callback_list.on_train_end()
self.set_summary(self.get_model_summary())
def fit_single_model(self, data_instances, validate_data=None):
LOGGER.info(f"Start to train single {self.model_name}")
if len(self.component_properties.host_party_idlist) > 1:
raise ValueError(f"Hetero SSHE Model does not support multi-host training.")
self.callback_list.on_train_begin(data_instances, validate_data)
model_shape = self.get_features_shape(data_instances)
instances_count = data_instances.count()
if not self.component_properties.is_warm_start:
w = self._init_weights(model_shape)
self.model_weights = LinearModelWeights(l=w,
fit_intercept=self.model_param.init_param.fit_intercept)
last_models = copy.deepcopy(self.model_weights)
else:
last_models = copy.deepcopy(self.model_weights)
w = last_models.unboxed
self.callback_warm_start_init_iter(self.n_iter_)
if self.role == consts.GUEST:
if with_weight(data_instances):
LOGGER.info(f"data with sample weight, use sample weight.")
if self.model_param.early_stop == "diff":
LOGGER.warning("input data with weight, please use 'weight_diff' for 'early_stop'.")
data_instances = scale_sample_weight(data_instances)
self.batch_generator.initialize_batch_generator(data_instances, batch_size=self.batch_size)
with SPDZ(
"hetero_sshe",
local_party=self.local_party,
all_parties=self.parties,
q_field=self.q_field,
use_mix_rand=self.model_param.use_mix_rand,
) as spdz:
spdz.set_flowid(self.flowid)
self.secure_matrix_obj.set_flowid(self.flowid)
# not sharing the model when reveal_every_iter
if not self.reveal_every_iter:
w_self, w_remote = self.share_model(w, suffix="init")
last_w_self, last_w_remote = w_self, w_remote
LOGGER.debug(f"first_w_self shape: {w_self.shape}, w_remote_shape: {w_remote.shape}")
batch_data_generator = self.batch_generator.generate_batch_data()
encoded_batch_data = []
batch_labels_list = []
batch_weight_list = []
for batch_data in batch_data_generator:
if self.fit_intercept:
batch_features = batch_data.mapValues(lambda x: np.hstack((x.features, 1.0)))
else:
batch_features = batch_data.mapValues(lambda x: x.features)
if self.role == consts.GUEST:
batch_labels = batch_data.mapValues(lambda x: np.array([x.label], dtype=self.label_type))
batch_labels_list.append(batch_labels)
if self.weight:
batch_weight = batch_data.mapValues(lambda x: np.array([x.weight], dtype=float))
batch_weight_list.append(batch_weight)
else:
batch_weight_list.append(None)
self.batch_num.append(batch_data.count())
encoded_batch_data.append(
fixedpoint_table.FixedPointTensor(self.fixedpoint_encoder.encode(batch_features),
q_field=self.fixedpoint_encoder.n,
endec=self.fixedpoint_encoder))
while self.n_iter_ < self.max_iter:
self.callback_list.on_epoch_begin(self.n_iter_)
LOGGER.info(f"start to n_iter: {self.n_iter_}")
loss_list = []
self.optimizer.set_iters(self.n_iter_)
if not self.reveal_every_iter:
self.self_optimizer.set_iters(self.n_iter_)
self.remote_optimizer.set_iters(self.n_iter_)
for batch_idx, batch_data in enumerate(encoded_batch_data):
current_suffix = (str(self.n_iter_), str(batch_idx))
if self.role == consts.GUEST:
batch_labels = batch_labels_list[batch_idx]
batch_weight = batch_weight_list[batch_idx]
else:
batch_labels = None
batch_weight = None
if self.reveal_every_iter:
y = self.forward(weights=self.model_weights,
features=batch_data,
labels=batch_labels,
suffix=current_suffix,
cipher=self.cipher,
batch_weight=batch_weight)
else:
y = self.forward(weights=(w_self, w_remote),
features=batch_data,
labels=batch_labels,
suffix=current_suffix,
cipher=self.cipher,
batch_weight=batch_weight)
if self.role == consts.GUEST:
if self.weight:
error = y - batch_labels.join(batch_weight, lambda y, b: y * b)
else:
error = y - batch_labels
self_g, remote_g = self.backward(error=error,
features=batch_data,
suffix=current_suffix,
cipher=self.cipher)
else:
self_g, remote_g = self.backward(error=y,
features=batch_data,
suffix=current_suffix,
cipher=self.cipher)
# loss computing;
suffix = ("loss",) + current_suffix
if self.reveal_every_iter:
batch_loss = self.compute_loss(weights=self.model_weights,
labels=batch_labels,
suffix=suffix,
cipher=self.cipher)
else:
batch_loss = self.compute_loss(weights=(w_self, w_remote),
labels=batch_labels,
suffix=suffix,
cipher=self.cipher)
if batch_loss is not None:
batch_loss = batch_loss * self.batch_num[batch_idx]
loss_list.append(batch_loss)
if self.reveal_every_iter:
# LOGGER.debug(f"before reveal: self_g shape: {self_g.shape}, remote_g_shape: {remote_g}，"
# f"self_g: {self_g}")
new_g = self.reveal_models(self_g, remote_g, suffix=current_suffix)
# LOGGER.debug(f"after reveal: new_g shape: {new_g.shape}, new_g: {new_g}"
# f"self.model_param.reveal_strategy: {self.model_param.reveal_strategy}")
if new_g is not None:
self.model_weights = self.optimizer.update_model(self.model_weights, new_g,
has_applied=False)
else:
self.model_weights = LinearModelWeights(
l=np.zeros(self_g.shape),
fit_intercept=self.model_param.init_param.fit_intercept)
else:
if self.optimizer.penalty == consts.L2_PENALTY:
self_g = self_g + self.self_optimizer.alpha * w_self
remote_g = remote_g + self.remote_optimizer.alpha * w_remote
# LOGGER.debug(f"before optimizer: {self_g}, {remote_g}")
self_g = self.self_optimizer.apply_gradients(self_g)
remote_g = self.remote_optimizer.apply_gradients(remote_g)
# LOGGER.debug(f"after optimizer: {self_g}, {remote_g}")
w_self -= self_g
w_remote -= remote_g
LOGGER.debug(f"w_self shape: {w_self.shape}, w_remote_shape: {w_remote.shape}")
if self.role == consts.GUEST:
loss = np.sum(loss_list) / instances_count
self.loss_history.append(loss)
if self.need_call_back_loss:
self.callback_loss(self.n_iter_, loss)
else:
loss = None
if self.converge_func_name in ["diff", "abs"]:
self.is_converged = self.check_converge_by_loss(loss, suffix=(str(self.n_iter_),))
elif self.converge_func_name == "weight_diff":
if self.reveal_every_iter:
self.is_converged = self.check_converge_by_weights(
last_w=last_models.unboxed,
new_w=self.model_weights.unboxed,
suffix=(str(self.n_iter_),))
last_models = copy.deepcopy(self.model_weights)
else:
self.is_converged = self.check_converge_by_weights(
last_w=(last_w_self, last_w_remote),
new_w=(w_self, w_remote),
suffix=(str(self.n_iter_),))
last_w_self, last_w_remote = copy.deepcopy(w_self), copy.deepcopy(w_remote)
else:
raise ValueError(f"Cannot recognize early_stop function: {self.converge_func_name}")
LOGGER.info("iter: {}, is_converged: {}".format(self.n_iter_, self.is_converged))
self.callback_list.on_epoch_end(self.n_iter_)
self.n_iter_ += 1
if self.stop_training:
break
if self.is_converged:
break
# Finally reconstruct
if not self.reveal_every_iter:
new_w = self.reveal_models(w_self, w_remote, suffix=("final",))
if new_w is not None:
self.model_weights = LinearModelWeights(
l=new_w,
fit_intercept=self.model_param.init_param.fit_intercept)
LOGGER.debug(f"loss_history: {self.loss_history}")
self.set_summary(self.get_model_summary())