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IID_average_evaluation.py
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IID_average_evaluation.py
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import pandas as pd
import numpy as np
from keras.layers import Input, Dense, Dropout
from keras.models import Model
from sklearn.metrics import auc
from sklearn.metrics import roc_curve
from model_average import *
import matplotlib.pyplot as plt
from keras import initializers
def ann(X_train, Y_train, random_seed, batch_size_specified=100, dropout_rate=0.5):
#model
input_shape = X_train.shape[1]
# input layer
input_layer = Input(shape=(input_shape,))
# hidden layers
hidden_layer1 = Dense(20, activation='relu', kernel_initializer=initializers.glorot_uniform(seed=random_seed))(input_layer)
hidden_layer1 = Dropout(dropout_rate)(hidden_layer1)
hidden_layer2 = Dense(10, activation='relu')(hidden_layer1)
hidden_layer2 = Dropout(dropout_rate)(hidden_layer2)
hidden_layer3 = Dense(5, activation='relu')(hidden_layer2)
hidden_layer3 = Dropout(dropout_rate)(hidden_layer3)
# output layer
output_layer = Dense(1, activation='sigmoid')(hidden_layer3)
ann_model = Model(inputs=input_layer, outputs=output_layer)
ann_model.compile(optimizer='adam', loss='binary_crossentropy')
#ann_model.summary()
history = ann_model.fit(X_train, Y_train,
epochs=5,
batch_size=batch_size_specified,
shuffle=True,
verbose=False)
loss = history.history["loss"][-1]
return ann_model, loss
def ann2(X_train, Y_train, initializers, batch_size_specified=100, dropout_rate=0.5):
kernel_indices = [0, 2, 4, 6]
bias_indices = [1, 3, 5, 7]
kernel_initializers = np.array(initializers)[kernel_indices]
bias_initializers = np.array(initializers)[bias_indices]
#model
input_shape = X_train.shape[1]
# input layer
input_layer = Input(shape=(input_shape,))
# hidden layers
hidden_layer1 = Dense(20, activation='relu', weights=[kernel_initializers[0], bias_initializers[0]])(input_layer)
hidden_layer1 = Dropout(dropout_rate)(hidden_layer1)
hidden_layer2 = Dense(10, activation='relu', weights=[kernel_initializers[1], bias_initializers[1]])(hidden_layer1)
hidden_layer2 = Dropout(dropout_rate)(hidden_layer2)
hidden_layer3 = Dense(5, activation='relu', weights=[kernel_initializers[2], bias_initializers[2]])(hidden_layer2)
hidden_layer3 = Dropout(dropout_rate)(hidden_layer3)
# output layer
output_layer = Dense(1, activation='sigmoid', weights=[kernel_initializers[3], bias_initializers[3]])(hidden_layer3)
ann_model = Model(inputs=input_layer, outputs=output_layer)
ann_model.compile(optimizer='adam', loss='binary_crossentropy')
#ann_model.summary()
history = ann_model.fit(X_train, Y_train,
epochs=5,
batch_size=batch_size_specified,
shuffle=True,
verbose=False)
loss = history.history["loss"][-1]
return ann_model, loss
def calculate_auc(model, X_test, Y_test):
Y_pred = model.predict(X_test)
fpr, tpr, thresholds = roc_curve(Y_test, Y_pred, pos_label=1)
roc_auc = auc(fpr, tpr)
return roc_auc
def federated_learning(num_of_clients):
average_training_aucs = []
end_of_loop_test_aucs = []
# global loops
for t in range(30):
np.random.seed(t+1)
indices = np.random.choice(100, num_of_clients, replace=False)
#print indices
print "round " + str(t+1) +" start, random seed=" + str(t+1)
X_train_clients = X_train_100_shares[indices]
Y_train_clients = Y_train_100_shares[indices]
anns = []
roc_aucs = []
test_aucs = []
losses = []
for i in range(num_of_clients):
if t == 0:
ann_model, loss = ann(np.array(X_train_clients[i]), np.array(Y_train_clients[i]), random_seed=t+1,
batch_size_specified=30,
dropout_rate=0.0)
else:
ann_model, loss = ann2(np.array(X_train_clients[i]), np.array(Y_train_clients[i]),
initializers=weights, batch_size_specified=30, dropout_rate=0.0)
anns.append(ann_model)
# calculate auc for model trained with each client
roc_auc = calculate_auc(ann_model, np.array(X_train_clients[i]), np.array(Y_train_clients[i]))
roc_aucs.append(roc_auc)
#loss
losses.append(loss)
#test auc
test_auc = calculate_auc(ann_model, X_test, Y_test)
test_aucs.append(test_auc)
#print "round " + str(t+2) + " client " + str(i+1) + " loss=" + str(loss) +\
# " training auc=" + str(roc_auc) + " test auc=" + str(test_auc)
average_training_auc = np.average(roc_aucs)
print "round " + str(t+1) + " average training auc=" + str(average_training_auc)
average_training_aucs.append(average_training_auc)
anns[0].set_weights(average(anns))
end_of_loop_test_auc = calculate_auc(anns[0], X_test, Y_test)
print "round " + str(t+1) + " test auc=" + str(end_of_loop_test_auc)
end_of_loop_test_aucs.append(end_of_loop_test_auc)
weights = anns[0].get_weights()
federated_ann = anns[0]
federated_ann.summary()
return federated_ann, average_training_aucs, end_of_loop_test_aucs
def prepare_data():
X_train = pd.read_csv("./IID_data/X_train.csv", dtype="int", header=None).values
Y_train = pd.read_csv("./IID_data/Y_train.csv", dtype="int", header=None).values
X_train_100_shares = np.array(np.array_split(X_train, 100))
Y_train_100_shares = np.array(np.array_split(Y_train, 100))
X_test = pd.read_csv("./IID_data/X_test.csv", dtype="int", header=None).values
Y_test = pd.read_csv("./IID_data/Y_test.csv", dtype="int", header=None).values
return X_train_100_shares, Y_train_100_shares, X_test, Y_test
def federated_learning_evaluation(num_of_clients):
print "CLIENTS " + str(num_of_clients) + "% START"
federated_ann, average_training_aucs, end_of_loop_test_aucs = federated_learning(num_of_clients)
#pd.DataFrame(average_training_aucs).to_csv("./IID_evaluation/"+ str(num_of_clients) + "simple_average_training_aucs.csv",
# header=False, index=False)
pd.DataFrame(end_of_loop_test_aucs).to_csv("./IID_evaluation/"+ str(num_of_clients) + "average_test_aucs.csv",
header=False, index=False)
print "CLIENTS " + str(num_of_clients) + "% END"
X_train_100_shares, Y_train_100_shares, X_test, Y_test = prepare_data()
#federated_learning_evaluation(10)
federated_learning_evaluation(20)
federated_learning_evaluation(50)
federated_learning_evaluation(90)