class TestHomoLRGradient(unittest.TestCase):
def setUp(self):
self.paillier_encrypt = PaillierEncrypt()
self.paillier_encrypt.generate_key()
self.gradient_operator = LogisticGradient()
self.taylor_operator = TaylorLogisticGradient()
self.X = np.array([[1, 2, 3, 4, 5], [3, 2, 4, 5, 1], [
2,
2,
3,
1,
1,
]]) / 10
self.X1 = np.c_[self.X, np.ones(3)]
self.Y = np.array([[1], [1], [-1]])
self.values = []
for idx, x in enumerate(self.X):
inst = Instance(inst_id=idx, features=x, label=self.Y[idx])
self.values.append((idx, inst))
self.values1 = []
for idx, x in enumerate(self.X1):
inst = Instance(inst_id=idx, features=x, label=self.Y[idx])
self.values1.append((idx, inst))
self.coef = np.array([2, 2.3, 3, 4, 2.1]) / 10
self.coef1 = np.append(self.coef, [1])
def test_gradient_length(self):
fit_intercept = False
grad, loss = self.gradient_operator.compute(self.values, self.coef, 0,
fit_intercept)
self.assertEqual(grad.shape[0], self.X.shape[1])
taylor_grad, loss = self.taylor_operator.compute(
self.values, self.coef, 0, fit_intercept)
self.assertEqual(taylor_grad.shape[0], self.X.shape[1])
self.assertTrue(np.sum(grad - taylor_grad) < 0.0001)
fit_intercept = True
grad, loss = self.gradient_operator.compute(self.values, self.coef, 0,
fit_intercept)
self.assertEqual(grad.shape[0], self.X.shape[1] + 1)
taylor_grad, loss = self.taylor_operator.compute(
self.values, self.coef, 0, fit_intercept)
self.assertEqual(taylor_grad.shape[0], self.X.shape[1] + 1)
self.assertTrue(np.sum(grad - taylor_grad) < 0.0001)
class TestHomoLR(unittest.TestCase):
def setUp(self):
self.guest_X = np.array([[1, 2, 3, 4, 5], [3, 2, 4, 5, 1],
[
2,
2,
3,
1,
1,
]]) / 10
self.guest_Y = np.array([[1], [1], [-1]])
self.values = []
for idx, x in enumerate(self.guest_X):
inst = Instance(inst_id=idx, features=x, label=self.guest_Y[idx])
self.values.append((idx, inst))
self.host_X = np.array([[1, 1.2, 3.1, 4, 5], [2.3, 2, 4, 5.3, 1],
[
2,
2.2,
1.3,
1,
1.6,
]]) / 10
self.host_Y = np.array([[-1], [1], [-1]])
self.host_values = []
for idx, x in enumerate(self.host_X):
inst = Instance(inst_id=idx, features=x, label=self.host_Y[idx])
self.values.append((idx, inst))
self.max_iter = 10
self.alpha = 0.01
self.learning_rate = 0.01
optimizer = 'SGD'
self.gradient_operator = LogisticGradient()
self.initializer = Initializer()
self.fit_intercept = True
self.init_param_obj = InitParam(fit_intercept=self.fit_intercept)
self.updater = L2Updater(self.alpha, self.learning_rate)
self.optimizer = Optimizer(learning_rate=self.learning_rate,
opt_method_name=optimizer)
self.__init_model()
def __init_model(self):
model_shape = self.guest_X.shape[1]
w = self.initializer.init_model(model_shape,
init_params=self.init_param_obj)
if self.fit_intercept:
self.coef_ = w[:-1]
self.intercept_ = w[-1]
else:
self.coef_ = w
self.intercept_ = 0
return w
def __init_host_model(self):
model_shape = self.host_X.shape[1]
w = self.initializer.init_model(model_shape,
init_params=self.init_param_obj)
if self.fit_intercept:
self.host_coef_ = w[:-1]
self.host_intercept_ = w[-1]
else:
self.host_coef_ = w
self.host_intercept_ = 0
return w
def test_one_iter(self):
w = self.__init_model()
print("before training, coef: {}, intercept: {}".format(
self.coef_, self.intercept_))
self.assertEqual(self.coef_.shape[0], self.guest_X.shape[1])
grad, loss = self.gradient_operator.compute(
self.values,
coef=self.coef_,
intercept=self.intercept_,
fit_intercept=self.fit_intercept)
loss_norm = self.updater.loss_norm(self.coef_)
loss = loss + loss_norm
delta_grad = self.optimizer.apply_gradients(grad)
self.update_model(delta_grad)
print("After training, coef: {}, intercept: {}, loss: {}".format(
self.coef_, self.intercept_, loss))
def test_multi_iter(self):
w = self.__init_model()
loss_hist = [100]
for iter_num in range(self.max_iter):
grad, loss = self.gradient_operator.compute(
self.values,
coef=self.coef_,
intercept=self.intercept_,
fit_intercept=self.fit_intercept)
loss_norm = self.updater.loss_norm(self.coef_)
loss = loss + loss_norm
delta_grad = self.optimizer.apply_gradients(grad)
self.update_model(delta_grad)
self.assertTrue(loss <= loss_hist[-1])
loss_hist.append(loss)
print(loss_hist)
def test_host_iter(self):
w = self.__init_host_model()
print("before training, coef: {}, intercept: {}".format(
self.coef_, self.intercept_))
self.assertEqual(self.host_coef_.shape[0], self.host_X.shape[1])
grad, loss = self.gradient_operator.compute(
self.host_values,
coef=self.host_coef_,
intercept=self.intercept_,
fit_intercept=self.fit_intercept)
loss_norm = self.updater.loss_norm(self.coef_)
# print("***********************************************")
# print(loss, loss_norm)
self.assertTrue(loss is None)
def update_model(self, gradient):
LOGGER.debug(
"In update_model function, shape of coef: {}, shape of gradient: {}"
.format(np.shape(self.coef_), np.shape(gradient)))
if self.fit_intercept:
if self.updater is not None:
self.coef_ = self.updater.update_coef(self.coef_,
gradient[:-1])
else:
self.coef_ = self.coef_ - gradient[:-1]
self.intercept_ -= gradient[-1]
else:
if self.updater is not None:
self.coef_ = self.updater.update_coef(self.coef_, gradient)
else:
self.coef_ = self.coef_ - gradient