def train_teacher(FLAGS, dataset, nb_teachers, teacher_id):
"""
This function trains a teacher (teacher id) among an ensemble of nb_teachers
models for the dataset specified.
:param dataset: string corresponding to dataset (svhn, cifar10)
:param nb_teachers: total number of teachers in the ensemble
:param teacher_id: id of the teacher being trained
:return: True if everything went well
"""
# If working directories do not exist, create them
assert input.create_dir_if_needed(FLAGS.data_dir)
assert input.create_dir_if_needed(FLAGS.train_dir)
# Load the dataset
if dataset == 'svhn':
train_data,train_labels,test_data,test_labels = input.ld_svhn(extended=True)
elif dataset == 'cifar10':
train_data, train_labels, test_data, test_labels = input.ld_cifar10()
elif dataset == 'mnist':
train_data, train_labels, test_data, test_labels = input.ld_mnist()
else:
print("Check value of dataset flag")
return False
if FLAGS.cov_shift == True:
teacher_file_name = FLAGS.data + 'PCA_teacher' + FLAGS.dataset + '.pkl'
student_file_name = FLAGS.data + 'PCA_student' + FLAGS.dataset + '.pkl'
f = open(teacher_file_name, 'rb')
train_data = pickle.load(f)
f = open(student_file_name, 'rb')
test_data = pickle.load(f)
# Retrieve subset of data for this teacher
data, labels = input.partition_dataset(train_data,
train_labels,
nb_teachers,
teacher_id)
print("Length of training data: " + str(len(labels)))
# Define teacher checkpoint filename and full path
if FLAGS.deeper:
filename = str(nb_teachers) + 'pca_teachers_' + str(teacher_id) + '_deep.ckpt'
else:
filename = str(nb_teachers) + 'pca_teachers_' + str(teacher_id) + '.ckpt'
ckpt_path = FLAGS.train_dir + '/' + str(dataset) + '_' + filename
# Perform teacher training
assert deep_cnn.train(data, labels, ckpt_path)
# Append final step value to checkpoint for evaluation
ckpt_path_final = ckpt_path + '-' + str(FLAGS.max_steps - 1)
# Retrieve teacher probability estimates on the test data
teacher_preds = deep_cnn.softmax_preds(test_data, ckpt_path_final)
# Compute teacher accuracy
precision = metrics.accuracy(teacher_preds, test_labels)
print('Precision of teacher after training: ' + str(precision))
return True
def pca_transform(dataset, FLAGS):
"""
Do PCA transform on both teacher and student dataset
:param dataset:
:return:
pca transformed teacher and student dataset
"""
teacher_file_name = FLAGS.data + '/PCA_teacher' + dataset + '.pkl'
student_file_name = FLAGS.data + '/PCA_student' + dataset + '.pkl'
#if os.path.exists(teacher_file_name):
#return
test_only = False
train_only = False
dim = 784
# Load the dataset
if dataset == 'svhn':
train_data, train_labels, test_data, test_labels = input.ld_svhn(
test_only, train_only)
elif dataset == 'cifar10':
train_data, train_labels, test_data, test_labels = input.ld_cifar10(
test_only, train_only)
elif dataset == 'mnist':
train_data, train_labels, test_data, test_labels = input.ld_mnist(
test_only, train_only)
else:
print("Check value of dataset flag")
return False
ori_train = train_data.shape
ori_test = test_data.shape
test_data = test_data.reshape((-1, dim))
train_data = train_data.reshape((-1, dim))
pca = PCA(n_components=1)
pca.fit(test_data)
max_component = pca.components_.T
projection = np.dot(test_data, max_component)
min_v = min(projection)
mean_v = np.mean(projection)
a = 1
b = 1
mu = min_v + (mean_v - min_v) / a
var = (mean_v - min_v) / b
prob = scipy.stats.norm(mu, var).pdf(projection)
prob = np.ravel(prob.T) # transform into 1d dim
index = np.where(prob > 0)[0]
sample = np.random.choice(index,
len(index),
replace=True,
p=prob / sum(prob))
test_data = test_data[sample]
train_data = np.reshape(train_data, ori_train)
test_data = np.reshape(test_data, ori_test)
f = open(teacher_file_name, 'wb')
pickle.dump(train_data, f)
f = open(student_file_name, 'wb')
pickle.dump(test_data, f)
print('finish pca transform')
def train_teacher(dataset, nb_teachers, teacher_id):
"""
This function trains a teacher (teacher id) among an ensemble of nb_teachers
models for the dataset specified.
:param dataset: string corresponding to dataset (svhn, cifar10)
:param nb_teachers: total number of teachers in the ensemble
:param teacher_id: id of the teacher being trained
:return: True if everything went well
"""
# If working directories do not exist, create them
assert input.create_dir_if_needed(FLAGS.data_dir)
assert input.create_dir_if_needed(FLAGS.train_dir)
# Load the dataset
if dataset == 'svhn':
train_data,train_labels,test_data,test_labels = input.ld_svhn(extended=True)
elif dataset == 'cifar10':
train_data, train_labels, test_data, test_labels = input.ld_cifar10()
elif dataset == 'mnist':
train_data, train_labels, test_data, test_labels = input.ld_mnist()
else:
print("Check value of dataset flag")
return False
# Retrieve subset of data for this teacher
data, labels = input.partition_dataset(train_data,
train_labels,
nb_teachers,
teacher_id)
print("Length of training data: " + str(len(labels)))
# Define teacher checkpoint filename and full path
if FLAGS.deeper:
filename = str(nb_teachers) + '_teachers_' + str(teacher_id) + '_deep.ckpt'
else:
filename = str(nb_teachers) + '_teachers_' + str(teacher_id) + '.ckpt'
ckpt_path = FLAGS.train_dir + '/' + str(dataset) + '_' + filename
# Perform teacher training
assert deep_cnn.train(data, labels, ckpt_path)
# Append final step value to checkpoint for evaluation
ckpt_path_final = ckpt_path + '-' + str(FLAGS.max_steps - 1)
# Retrieve teacher probability estimates on the test data
teacher_preds = deep_cnn.softmax_preds(test_data, ckpt_path_final)
# Compute teacher accuracy
precision = metrics.accuracy(teacher_preds, test_labels)
print('Precision of teacher after training: ' + str(precision))
return True
def load_data(dataset):
if dataset == 'svhn':
train_data, train_labels, test_data, test_labels = input.ld_svhn(
extended=True)
elif dataset == 'cifar10':
train_data, train_labels, test_data, test_labels = input.ld_cifar10()
elif dataset == 'mnist':
train_data, train_labels, test_data, test_labels = input.ld_mnist()
else:
print("Check value of dataset flag")
return False
return train_data, train_labels, test_data, test_labels
def load_dataset(dataset, test_only=False, train_only=False):
if dataset == 'svhn':
test_data, test_labels = input.ld_svhn(test_only=test_only)
return test_data, test_labels
elif dataset == 'cifar10':
test_data, test_labels = input.ld_cifar10(test_only=test_only)
elif dataset == 'mnist':
test_data, test_labels = input.ld_mnist(test_only=test_only)
elif dataset == 'adult':
test_data, test_labels = input.ld_adult(test_only = test_only)
else:
print("Check value of dataset flag")
return test_data, test_labels
def predict_teacher(dataset, nb_teachers):
"""
This is for obtaining the weight from student / teache, don't involve any noise
:param dataset: string corresponding to mnist, cifar10, or svhn
:param nb_teachers: number of teachers (in the ensemble) to learn from
:param teacher: if teacher is true, then predict with training dataset, else students
:return: out prediction based on cnn
"""
assert input.create_dir_if_needed(FLAGS.train_dir)
train_only = True
test_only = False
# create path to save teacher predict teacher model
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_teacher_clean_votes_label_shift' + str(
FLAGS.lap_scale) + '.npy'
# Load the dataset
if dataset == 'svhn':
test_data, test_labels = input.ld_svhn(test_only, train_only)
elif dataset == 'cifar10':
test_data, test_labels = input.ld_cifar10(test_only, train_only)
elif dataset == 'mnist':
test_data, test_labels = input.ld_mnist(test_only, train_only)
elif dataset == 'adult':
test_data, test_labels = input.ld_adult(test_only, train_only)
else:
print("Check value of dataset flag")
return False
if os.path.exists(filepath):
pred_labels = np.load(filepath)
return pred_labels, test_labels
teachers_preds = ensemble_preds(dataset, nb_teachers, test_data)
# Aggregate teacher predictions to get student training labels
pred_labels = aggregation.noisy_max(FLAGS.nb_teachers, teachers_preds, 0)
utils.save_file(filepath, pred_labels)
# Print accuracy of aggregated labels
ac_ag_labels = metrics.accuracy(pred_labels, test_labels)
print("obtain_weight Accuracy of the aggregated labels: " +
str(ac_ag_labels))
return pred_labels, test_labels
def prepare_student_data(dataset, nb_teachers,shift_idx,nb_q=None):
"""
Takes a dataset name and the size of the teacher ensemble and prepares
training data for the student model, according to parameters indicated
in flags above.
:param dataset: string corresponding to mnist, cifar10, or svhn
:param nb_teachers: number of teachers (in the ensemble) to learn from
:param save: if set to True, will dump student training labels predicted by
the ensemble of teachers (with Laplacian noise) as npy files.
It also dumps the clean votes for each class (without noise) and
the labels assigned by teachers
:return: pairs of (data, labels) to be used for student training and testing
"""
if dataset == 'svhn':
test_data, test_labels = input.ld_svhn(test_only=True)
elif dataset == 'cifar10':
test_data, test_labels = input.ld_cifar10(test_only=True)
elif dataset == 'mnist':
test_data, test_labels = input.ld_mnist(test_only=True)
elif dataset == 'adult':
test_data, test_labels = input.ld_adult(test_only = True)
else:
print("Check value of dataset flag")
return False
if nb_q !=None:
shift_idx = np.random.choice(shift_idx, nb_q)
# Prepare filepath for numpy dump of clean votessvhn_250_student_clean_test.npy
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(nb_teachers) + '_student_clean_test.npy' # NOLINT(long-line)
if os.path.exists(filepath):
with open(filepath,'rb')as f:
clean_votes = np.load(f)
keep_idx, result = gaussian(FLAGS.nb_labels, clean_votes,shift_idx)
precision_true = metrics.accuracy(result, test_labels[keep_idx])
print('number of idx={} precision_true from gaussian for shift data={}'.format(len(keep_idx[0]), precision_true))
return keep_idx, test_data[keep_idx], result
print('not find file for clean student vote')
def predict_data(dataset, nb_teachers, teacher=False):
"""
This is for obtaining the weight from student / teache, don't involve any noise
:param dataset: string corresponding to mnist, cifar10, or svhn
:param nb_teachers: number of teachers (in the ensemble) to learn from
:param teacher: if teacher is true, then predict with training dataset, else students
:return: out prediction based on cnn
"""
assert input.create_dir_if_needed(FLAGS.train_dir)
if teacher:
train_only = True
test_only = False
else:
train_only = False
test_only = True
# Load the dataset
if dataset == 'svhn':
test_data, test_labels = input.ld_svhn(test_only, train_only)
elif dataset == 'cifar10':
test_data, test_labels = input.ld_cifar10(test_only, train_only)
elif dataset == 'mnist':
test_data, test_labels = input.ld_mnist(test_only, train_only)
elif dataset == 'adult':
test_data, test_labels = input.ld_adult(test_only, train_only)
else:
print("Check value of dataset flag")
return False
teachers_preds = ensemble_preds(dataset, nb_teachers, test_data)
# Aggregate teacher predictions to get student training labels
pred_labels = aggregation.noisy_max(FLAGS.nb_teachers, teachers_preds, 0)
# Print accuracy of aggregated labels
ac_ag_labels = metrics.accuracy(pred_labels, test_labels)
print("obtain_weight Accuracy of the aggregated labels: " +
str(ac_ag_labels))
return test_data, pred_labels, test_labels
def train_teacher(dataset, nb_teachers, teacher_id):
"""
This function trains a teacher (teacher id) among an ensemble of nb_teachers
models for the dataset specified.
:param dataset: string corresponding to dataset (svhn, cifar10)
:param nb_teachers: total number of teachers in the ensemble
:param teacher_id: id of the teacher being trained
:return: True if everything went well
"""
# If working directories do not exist, create them
assert input.create_dir_if_needed(FLAGS.data_dir)
assert input.create_dir_if_needed(FLAGS.train_dir)
print("teacher {}:".format(teacher_id))
# Load the dataset
if dataset == 'svhn':
train_data, train_labels, test_data, test_labels = input.ld_svhn(
extended=True)
elif dataset == 'cifar10':
train_data, train_labels, test_data, test_labels = input.ld_cifar10()
elif dataset == 'mnist':
train_data, train_labels, test_data, test_labels = input.ld_mnist()
else:
print("Check value of dataset flag")
return False
path = os.path.abspath('.')
path1 = path + '\\plts_nodisturb\\'
# 对标签进行干扰
import copy
train_labels1 = copy.copy(train_labels)
train_labels2 = disturb(train_labels, 0.1)
disturb(test_labels, 0.1)
#path1 = path + '\\plts_withdisturb\\'
# Retrieve subset of data for this teacher
#干扰前
data, labels = input.partition_dataset(train_data, train_labels,
nb_teachers, teacher_id)
from pca import K_S
import operator
print(operator.eq(train_labels1, train_labels2))
print("干扰前: ", K_S.tst_norm(train_labels1))
print("干扰后: ", K_S.tst_norm(train_labels2))
print(K_S.tst_samp(train_labels1, train_labels2))
print("Length of training data: " + str(len(labels)))
# Define teacher checkpoint filename and full path
if FLAGS.deeper:
filename = str(nb_teachers) + '_teachers_' + str(
teacher_id) + '_deep.ckpt'
else:
filename = str(nb_teachers) + '_teachers_' + str(teacher_id) + '.ckpt'
ckpt_path = FLAGS.train_dir + '/' + str(dataset) + '_' + filename
# Perform teacher training
losses = deep_cnn.train(data, labels, ckpt_path)
# Append final step value to checkpoint for evaluation
ckpt_path_final = ckpt_path + '-' + str(FLAGS.max_steps - 1)
# Retrieve teacher probability estimates on the test data
teacher_preds = deep_cnn.softmax_preds(test_data, ckpt_path_final)
# Compute teacher accuracy
precision = metrics.accuracy(teacher_preds, test_labels)
print('Precision of teacher after training: ' + str(precision))
print("each n step loss: ", losses)
#x = list(range(1, len(losses)+1))
#plt.plot(x, losses, 'bo-', markersize=20)
#plt.savefig(path1 + 'loss' + str(teacher_id) + '.jpg')
#plt.show()
#print("x: ",x)
#print("loss: ", losses)
return True
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import input
import tensorflow as tf
import numpy as np
FLAGS = tf.flags.FLAGS
tf.flags.DEFINE_string('data_dir', 'data_dir', 'Temporary storage')
test_data, test_labels = input.ld_svhn(test_only=True)
test_data_1000 = test_data[:1000, :, :, :]
np.save(FLAGS.data_dir + '/svhn_test_1000', test_data_1000)
test_data, test_labels = input.ld_cifar10(test_only=True)
test_data_1000 = test_data[:1000, :, :, :]
np.save(FLAGS.data_dir + '/cifar10_test_1000', test_data_1000)
test_data, test_labels = input.ld_mnist(test_only=True)
test_data_1000 = test_data[:1000, :, :, :]
np.save(FLAGS.data_dir + '/mnist_test_1000', test_data_1000)
def prepare_student_data(dataset, nb_teachers, save=False):
"""
Takes a dataset name and the size of the teacher ensemble and prepares
f training data for the student model, according to parameters indicated
in flags above.
:param dataset: string corresponding to mnist, cifar10, or svhn
:param nb_teachers: number of teachers (in the ensemble) to learn from
:param save: if set to True, will dump student training labels predicted by
the ensemble of teachers (with Laplacian noise) as npy files.
It also dumps the clean votes for each class (without noise) and
the labels assigned by teachers
:return: pairs of (data, labels) to be used for student training and testing
"""
assert input.create_dir_if_needed(FLAGS.train_dir)
# Load the dataset
if dataset == 'svhn':
train_data, train_labels, test_data, test_labels = input.ld_svhn(
extended=True)
train_data = np.reshape(train_data, [-1, 32 * 32 * 3])
test_data = test_data.reshape([-1, 32 * 32 * 3])
elif dataset == 'cifar10':
train_data, train_labels, test_data, test_labels = input.ld_cifar10()
train_data = np.reshape(train_data, [-1, 32 * 32 * 3])
test_data = test_data.reshape([-1, 32 * 32 * 3])
elif dataset == 'mnist':
#test_data, test_labels = input.ld_mnist(test_only=True)
train_data, train_labels, test_data, test_labels = input.ld_mnist()
train_data = np.reshape(train_data, [-1, 28 * 28])
test_data = test_data.reshape([-1, 28 * 28])
else:
print("Check value of dataset flag")
return False
# Make sure there is data leftover to be used as a test set
"""
If FLAGS.extra >0, means we remove the first FLAGS.extra data point from
private dataset to student dataset. Default train_data is private.
Ori_test_data records the original feature of test data, since we will apply
PCA later.
iF FLAGS.vat == True, then '..ckpt-2000.py' is the prediction of student queries(A+B) from VAT, (A+B) is defined later
"""
if FLAGS.extra > 0:
test_data = np.vstack((test_data, train_data[:FLAGS.extra]))
test_labels = np.concatenate((test_labels, train_labels[:FLAGS.extra]))
#print('test_label.shape',test_labels.shape)
train_data = train_data[FLAGS.extra:]
train_labels = train_labels[FLAGS.extra:]
#print('train_size {} query_size {}'.format(train_data.shape[0], test_data.shape[0]))
ori_test_data = test_data
if FLAGS.vat == True and os.path.exists('record/svhn_model.ckpt-2000.npy'):
vat_labels = np.load('record/svhn_model.ckpt-2000.npy')
vat_labels = np.array(vat_labels, dtype=np.int32)
print('vat_label.shape', vat_labels.shape)
stdnt_test_data = ori_test_data[-1000:]
stdnt_test_labels = test_labels[-1000:]
return ori_test_data[:
-1000], vat_labels, stdnt_test_data, stdnt_test_labels
if FLAGS.pca == True:
train_data, test_data = pca(train_data, test_data)
stdnt_data = test_data[:FLAGS.stdnt_share]
assert FLAGS.stdnt_share < len(test_data)
"""
Compute teacher predictions for student queries
There is a subsample scheme here, each query will subsample a prob*train_data for KNN, distance is based on Euclidean distance.
autodp is used track privacy loss(compose_subsample_mechanisms)
TO privately release every query, we add gaussian noise
"""
num_train = train_data.shape[0]
teachers_preds = np.zeros([stdnt_data.shape[0], FLAGS.nb_teachers])
for idx in range(len(stdnt_data)):
if idx % 100 == 0:
print('idx=', idx)
query_data = stdnt_data[idx]
select_teacher = np.random.choice(train_data.shape[0],
int(prob * num_train))
dis = np.linalg.norm(train_data[select_teacher] - query_data, axis=1)
k_index = select_teacher[np.argsort(dis)[:FLAGS.nb_teachers]]
teachers_preds[idx] = train_labels[k_index]
acct.compose_poisson_subsampled_mechanisms(gaussian, prob, coeff=1)
#compute privacy loss
print("Composition of student subsampled Gaussian mechanisms gives ",
(acct.get_eps(delta), delta))
teachers_preds = np.asarray(teachers_preds, dtype=np.int32)
if not save:
major_vote = aggregation.aggregation_knn(teachers_preds, sigma)
stdnt_labels = major_vote
else:
# Request clean votes and clean labels as well
stdnt_labels, clean_votes, labels_for_dump = aggregation.aggregation_knn(
teachers_preds, sigma, return_clean_votes=True) #NOLINT(long-line)
# Prepare filepath for numpy dump of clean votes
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_student_clean_votes_gau_' + str(
FLAGS.gau_scale) + '.npy' # NOLINT(long-line)
# Prepare filepath for numpy dump of clean labels
filepath_labels = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_teachers_labels_gau_' + str(
FLAGS.gau_scale) + '.npy' # NOLINT(long-line)
# Dump clean_votes array
with tf.gfile.Open(filepath, mode='w') as file_obj:
np.save(file_obj, clean_votes)
# Dump labels_for_dump array
with tf.gfile.Open(filepath_labels, mode='w') as file_obj:
np.save(file_obj, labels_for_dump)
ac_ag_labels = metrics.accuracy(stdnt_labels,
test_labels[:FLAGS.stdnt_share])
print("Accuracy of the aggregated labels: " + str(ac_ag_labels))
"""
split data point for semi-supervised training (VAT)
Suppose original test data is SVHN, then split it into 3 part A, B, C
A has FLAGS.stdnt_share points, which are student queries answered by noisy KNN
B has test_data[FLAGS.stdnt_share:-1000] data point, which is used as unlabeled feature for VAT
C has the last 1k point for test
if don't use VAT, then ignore convert_vat
"""
convert_vat(ori_test_data, test_labels, stdnt_labels)
stdnt_test_data = ori_test_data[-1000:]
stdnt_test_labels = test_labels[-1000:]
if save:
# Prepare filepath for numpy dump of labels produced by noisy aggregation
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_student_labels_lap_' + str(
FLAGS.gau_scale) + '.npy' #NOLINT(long-line)
# Dump student noisy labels array
with tf.gfile.Open(filepath, mode='w') as file_obj:
np.save(file_obj, stdnt_labels)
return ori_test_data[:FLAGS.
stdnt_share], stdnt_labels, stdnt_test_data, stdnt_test_labels
def prepare_student_data(dataset, nb_teachers, save=False):
"""
Takes a dataset name and the size of the teacher ensemble and prepares
training data for the student model, according to parameters indicated
in flags above.
:param dataset: string corresponding to mnist, cifar10, or svhn
:param nb_teachers: number of teachers (in the ensemble) to learn from
:param save: if set to True, will dump student training labels predicted by
the ensemble of teachers (with Laplacian noise) as npy files.
It also dumps the clean votes for each class (without noise) and
the labels assigned by teachers
:return: pairs of (data, labels) to be used for student training and testing
"""
assert input.create_dir_if_needed(FLAGS.train_dir)
# Load the dataset
if dataset == 'svhn':
test_data, test_labels = input.ld_svhn(test_only=True)
elif dataset == 'cifar10':
test_data, test_labels = input.ld_cifar10(test_only=True)
elif dataset == 'mnist':
test_data, test_labels = input.ld_mnist(test_only=True)
else:
print("Check value of dataset flag")
return False
# Make sure there is data leftover to be used as a test set
assert FLAGS.stdnt_share < len(test_data)
# Prepare [unlabeled] student training data (subset of test set)
stdnt_data = test_data[:FLAGS.stdnt_share]
# Compute teacher predictions for student training data
teachers_preds = ensemble_preds(dataset, nb_teachers, stdnt_data)
# Aggregate teacher predictions to get student training labels
if not save:
stdnt_labels = aggregation.noisy_max(teachers_preds, FLAGS.lap_scale)
else:
# Request clean votes and clean labels as well
stdnt_labels, clean_votes, labels_for_dump = aggregation.noisy_max(teachers_preds, FLAGS.lap_scale, return_clean_votes=True) #NOLINT(long-line)
# Prepare filepath for numpy dump of clean votes
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(nb_teachers) + '_student_clean_votes_lap_' + str(FLAGS.lap_scale) + '.npy' # NOLINT(long-line)
# Prepare filepath for numpy dump of clean labels
filepath_labels = FLAGS.data_dir + "/" + str(dataset) + '_' + str(nb_teachers) + '_teachers_labels_lap_' + str(FLAGS.lap_scale) + '.npy' # NOLINT(long-line)
# Dump clean_votes array
with gfile.Open(filepath, mode='w') as file_obj:
np.save(file_obj, clean_votes)
# Dump labels_for_dump array
with gfile.Open(filepath_labels, mode='w') as file_obj:
np.save(file_obj, labels_for_dump)
# Print accuracy of aggregated labels
ac_ag_labels = metrics.accuracy(stdnt_labels, test_labels[:FLAGS.stdnt_share])
print("Accuracy of the aggregated labels: " + str(ac_ag_labels))
# Store unused part of test set for use as a test set after student training
stdnt_test_data = test_data[FLAGS.stdnt_share:]
stdnt_test_labels = test_labels[FLAGS.stdnt_share:]
if save:
# Prepare filepath for numpy dump of labels produced by noisy aggregation
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(nb_teachers) + '_student_labels_lap_' + str(FLAGS.lap_scale) + '.npy' #NOLINT(long-line)
# Dump student noisy labels array
with gfile.Open(filepath, mode='w') as file_obj:
np.save(file_obj, stdnt_labels)
return stdnt_data, stdnt_labels, stdnt_test_data, stdnt_test_labels
def prepare_student_data(dataset, nb_teachers, save=False):
"""
Takes a dataset name and the size of the teacher ensemble and prepares
training data for the student model, according to parameters indicated
in flags above.
:param dataset: string corresponding to mnist, cifar10, or svhn
:param nb_teachers: number of teachers (in the ensemble) to learn from
:param save: if set to True, will dump student training labels predicted by
the ensemble of teachers (with Laplacian noise) as npy files.
It also dumps the clean votes for each class (without noise) and
the labels assigned by teachers
:return: pairs of (data, labels) to be used for student training and testing
"""
assert input.create_dir_if_needed(FLAGS.train_dir)
# Load the dataset
if dataset == 'svhn':
test_data, test_labels = input.ld_svhn(test_only=True)
elif dataset == 'cifar10':
test_data, test_labels = input.ld_cifar10(test_only=True)
elif dataset == 'mnist':
test_data, test_labels = input.ld_mnist(test_only=True)
elif dataset == 'digit':
test_data, test_labels = input.ld_digit_test(test_name=FLAGS.test_name,
num=2000)
else:
print("Check value of dataset flag")
return False
# Make sure there is data leftover to be used as a test set
assert FLAGS.stdnt_share < len(test_data)
# Prepare [unlabeled] student training data (subset of test set)
if (FLAGS.d_stu > -1):
# stdnt_data = []
# for i in range(FLAGS.stdnt_share):
# new_img = transform.resize(skimage.img_as_ubyte(test_data[i].astype(int)),(28,28))
# if FLAGS.d_stu == 3:
# new_img = color.rgb2gray(new_img)
# else:
# new_img = new_img[ :,:, FLAGS.d_stu]
# stdnt_data.append(new_img.reshape(28,28,1).astype(np.float32))
# stdnt_data = np.array(stdnt_data)
trimmed = test_data[:FLAGS.stdnt_share, 2:30, 2:30, :]
# grey scale
if (FLAGS.d_stu == 3):
stdnt_data = 0.2125 * trimmed[:, :, :,
0] + 0.7154 * trimmed[:, :, :,
1] + 0.0721 * trimmed[:, :, :,
2]
else:
stdnt_data = trimmed[:, :, :, FLAGS.d_stu]
stdnt_data = stdnt_data.reshape((-1, 28, 28, 1))
else:
stdnt_data = test_data[:FLAGS.stdnt_share]
# Compute teacher predictions for student training data
teachers_preds = ensemble_preds(dataset, nb_teachers, stdnt_data)
# Aggregate teacher predictions to get student training labels
if not save:
stdnt_labels = aggregation.noisy_max(teachers_preds, FLAGS.lap_scale)
else:
# Request clean votes and clean labels as well
stdnt_labels, clean_votes, labels_for_dump = aggregation.noisy_max(
teachers_preds, FLAGS.lap_scale,
return_clean_votes=True) #NOLINT(long-line)
# Prepare filepath for numpy dump of clean votes
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_student_clean_votes_lap_' + str(
FLAGS.lap_scale) + '.npy' # NOLINT(long-line)
# Prepare filepath for numpy dump of clean labels
filepath_labels = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_teachers_labels_lap_' + str(
FLAGS.lap_scale) + '.npy' # NOLINT(long-line)
# Dump clean_votes array
with tf.gfile.Open(filepath, mode='w') as file_obj:
np.save(file_obj, clean_votes)
# Dump labels_for_dump array
with tf.gfile.Open(filepath_labels, mode='w') as file_obj:
np.save(file_obj, labels_for_dump)
# Print accuracy of aggregated labels
ac_ag_labels = metrics.accuracy(stdnt_labels,
test_labels[:FLAGS.stdnt_share])
print("Accuracy of the aggregated labels: " + str(ac_ag_labels))
# Store unused part of test set for use as a test set after student training
if FLAGS.dataset_teacher == 'mnist':
test_data, test_labels = input.ld_mnist(test_only=True)
else:
assert 0 == 1, "Non implemented error: dataset_teacher not equals to mnist"
# if FLAGS.d_stu > -1:
# stdnt_test_data = test_data[FLAGS.stdnt_share:, 2:30, 2:30, FLAGS.d_stu : FLAGS.d_stu+1]
# else:
stdnt_test_data = test_data[FLAGS.stdnt_share:]
stdnt_test_labels = test_labels[FLAGS.stdnt_share:]
if save:
# Prepare filepath for numpy dump of labels produced by noisy aggregation
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_student_labels_lap_' + str(
FLAGS.lap_scale) + '.npy' #NOLINT(long-line)
# Dump student noisy labels array
with tf.gfile.Open(filepath, mode='w') as file_obj:
np.save(file_obj, stdnt_labels)
return stdnt_data, stdnt_labels, stdnt_test_data, stdnt_test_labels
def prepare_student_data(dataset, nb_teachers, save=False, shift_data=None):
"""
Takes a dataset name and the size of the teacher ensemble and prepares
training data for the student model, according to parameters indicated
in flags above.
:param dataset: string corresponding to mnist, cifar10, or svhn
:param nb_teachers: number of teachers (in the ensemble) to learn from
:param save: if set to True, will dump student training labels predicted by
the ensemble of teachers (with Laplacian noise) as npy files.
It also dumps the clean votes for each class (without noise) and
the labels assigned by teachers
:return: pairs of (data, labels) to be used for student training and testing
"""
if dataset == 'svhn':
test_data, test_labels = input.ld_svhn(test_only=True)
elif dataset == 'cifar10':
test_data, test_labels = input.ld_cifar10(test_only=True)
elif dataset == 'mnist':
test_data, test_labels = input.ld_mnist(test_only=True)
elif dataset == 'adult':
test_data, test_labels = input.ld_adult(test_only=True)
else:
print("Check value of dataset flag")
return False
if FLAGS.cov_shift == True:
student_file_name = FLAGS.data + 'PCA_student' + FLAGS.dataset + '.pkl'
f = open(student_file_name, 'rb')
test = pickle.load(f)
test_data = test['data']
test_labels = test['label']
# Prepare [unlabeled] student training data (subset of test set)
stdnt_data = test_data
assert input.create_dir_if_needed(FLAGS.train_dir)
gau_filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_student_votes_sigma1:' + str(
FLAGS.sigma1) + '_sigma2:' + str(
FLAGS.sigma2) + '.npy' # NOLINT(long-line)
# Prepare filepath for numpy dump of clean votes
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_student_clean_votes' + str(
FLAGS.lap_scale) + '.npy' # NOLINT(long-line)
# Prepare filepath for numpy dump of clean labels
filepath_labels = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_teachers_labels_lap_' + str(
FLAGS.lap_scale) + '.npy' # NOLINT(long-line)
"""
if os.path.exists(filepath):
if FLAGS.PATE2 == True:
with open(filepath,'rb')as f:
clean_votes = np.load(f)
keep_idx, result = gaussian(FLAGS.nb_labels, clean_votes)
precision_true = metrics.accuracy(result, test_labels[keep_idx])
print('number of idx={}'.format(len(keep_idx[0])))
return keep_idx, stdnt_data[keep_idx], result
"""
# Load the dataset
# Make sure there is data leftover to be used as a test set
assert FLAGS.stdnt_share < len(test_data)
if shift_data is not None:
#no noise
# replace original student data with shift data
stdnt_data = shift_data['data']
test_labels = shift_data['label']
print('*** length of shift_data {} lable length={}********'.format(
len(stdnt_data), len(test_labels)))
# Compute teacher predictions for student training data
teachers_preds = ensemble_preds(dataset, nb_teachers, stdnt_data)
# Aggregate teacher predictions to get student training labels
if not save:
stdnt_labels = aggregation.noisy_max(teachers_preds, FLAGS.lap_scale)
else:
# Request clean votes and clean labels as well
stdnt_labels, clean_votes, labels_for_dump = aggregation.noisy_max(
FLAGS.nb_labels,
teachers_preds,
FLAGS.lap_scale,
return_clean_votes=True) #NOLINT(long-line)
if FLAGS.PATE2 == True:
keep_idx, result = gaussian(FLAGS.nb_labels, clean_votes)
# Dump clean_votes array
with tf.gfile.Open(filepath, mode='w') as file_obj:
np.save(file_obj, clean_votes)
# Dump labels_for_dump array
with tf.gfile.Open(filepath_labels, mode='w') as file_obj:
np.save(file_obj, labels_for_dump)
# Print accuracy of aggregated labels
if FLAGS.PATE2 == True:
with tf.gfile.Open(gau_filepath, mode='w') as file_obj:
np.save(file_obj, result)
ac_ag_labels = metrics.accuracy(result, test_labels[keep_idx])
print(
"number of gaussian student {} Accuracy of the aggregated labels:{} "
.format(len(result), ac_ag_labels))
return keep_idx, stdnt_data[keep_idx], result
else:
ac_ag_labels = metrics.accuracy(stdnt_labels, test_labels)
print("Accuracy of the aggregated labels: " + str(ac_ag_labels))
if save:
# Prepare filepath for numpy dump of labels produced by noisy aggregation
filepath = FLAGS.data_dir + "/" + str(dataset) + '_' + str(
nb_teachers) + '_student_labels_lap_' + str(
FLAGS.lap_scale) + '.npy' #NOLINT(long-line)
# Dump student noisy labels array
with tf.gfile.Open(filepath, mode='w') as file_obj:
np.save(file_obj, stdnt_labels)
return stdnt_data, stdnt_labels
