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HGT.py
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HGT.py
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import os
os.environ["CUDA_VISIBLE_DEVICES"] = "8"
import argparse
import time
import torch
from torch import nn
from torch_geometric.data import HeteroData
from sklearn.utils import shuffle
from sklearn.metrics import accuracy_score, f1_score, precision_score, recall_score
from Dataset import MGTAB
from models import HGT
from utils import sample_mask
import numpy as np
parser = argparse.ArgumentParser(description='HGT')
parser.add_argument('--task', type=str, default='bot', help='detection task of stance or bot')
parser.add_argument('--relation_select', type=int, default=[0,1], nargs='+', help='selection of relations in the graph (0-6).')
parser.add_argument('--random_seed', type=int, default=[1,2,3,4,5], nargs='+', help='selection of random seeds')
parser.add_argument('--hidden_dimension', type=int, default=256, help="linear channels")
parser.add_argument('--linear_channels', type=int, default=128, help="linear channels")
parser.add_argument('--out_channel', type=int, default=32, help='output channels')
parser.add_argument('--dropout', type=float, default=0.3, help='dropout rate (1 - keep probability)')
parser.add_argument('--epochs', type=int, default=200, help='description channel')
parser.add_argument('--lr', type=float, default=1e-3, help='initial learning rate')
parser.add_argument('--weight_decay', type=float, default=5e-4, help='weight decay for optimizer')
args = parser.parse_args()
def main(seed):
device = torch.device('cuda' if torch.cuda.is_available() else 'cpu')
dataset = MGTAB('./Dataset/MGTAB')
origin_data = dataset[0]
relation_dict = {
0:'followers',
1:'friends',
2:'mention',
3:'reply',
4:'quoted',
5:'url',
6:'hashtag'
}
sample_number = origin_data.x.shape[0]
args.features_num = origin_data.x.shape[1]
shuffled_idx = shuffle(np.array(range(sample_number)), random_state=seed)
train_idx = shuffled_idx[:int(0.7 * sample_number)]
val_idx = shuffled_idx[int(0.7 * sample_number):int(0.9 * sample_number)]
test_idx = shuffled_idx[int(0.9 * sample_number):]
origin_data.train_mask = sample_mask(train_idx, sample_number)
origin_data.val_mask = sample_mask(val_idx, sample_number)
origin_data.test_mask = sample_mask(test_idx, sample_number)
test_mask = origin_data.test_mask
train_mask = origin_data.train_mask
val_mask = origin_data.val_mask
origin_data.to(device)
data = HeteroData().to(device)
data.x = origin_data.x
if args.task == 'stance':
args.out_dim = 3
data.y = origin_data.y1
else:
args.out_dim = 2
data.y = origin_data.y2
data.edge_index = {}
if len(args.relation_select) > 0:
for index in args.relation_select:
data.edge_index[("user", relation_dict[index], "user")] = origin_data.edge_index[:, origin_data.edge_type==index]
print('{}'.format(relation_dict[index]), end=' ')
print('\n')
data.train_idx = torch.from_numpy(np.array([i for i in range(len(data.y.cpu()))])[origin_data.train_mask.cpu()])
data.valid_idx = torch.from_numpy(np.array([i for i in range(len(data.y.cpu()))])[origin_data.val_mask.cpu()])
data.test_idx = torch.from_numpy(np.array([i for i in range(len(data.y.cpu()))])[origin_data.test_mask.cpu()])
model = HGT(args, data.edge_index.keys()).to(device)
loss = nn.CrossEntropyLoss()
optimizer = torch.optim.AdamW(model.parameters(), lr=args.lr, weight_decay=args.weight_decay)
def train(epoch):
model.train()
output = model(data.x, data.edge_index)
loss_train = loss(output[origin_data.train_mask], data.y[origin_data.train_mask])
out = output.max(1)[1].to('cpu').detach().numpy()
label = data.y.to('cpu').detach().numpy()
acc_train = accuracy_score(out[train_mask], label[train_mask])
acc_val = accuracy_score(out[val_mask], label[val_mask])
optimizer.zero_grad()
loss_train.backward()
optimizer.step()
print('Epoch: {:04d}'.format(epoch + 1),
'loss_train: {:.4f}'.format(loss_train.item()),
'acc_train: {:.4f}'.format(acc_train.item()),
'acc_val: {:.4f}'.format(acc_val.item()), )
return acc_train, loss_train
def test():
model.eval()
output = model(data.x, data.edge_index)
loss_test = loss(output[origin_data.test_mask], data.y[origin_data.test_mask])
output = output.max(1)[1].to('cpu').detach().numpy()
label = data.y.to('cpu').detach().numpy()
acc_test = accuracy_score(label[test_mask], output[test_mask])
f1 = f1_score(label[test_mask], output[test_mask], average='macro')
precision = precision_score(label[test_mask], output[test_mask], average='macro')
recall = recall_score(label[test_mask], output[test_mask], average='macro')
return acc_test, loss_test, f1, precision, recall
max_acc = 0
for epoch in range(args.epochs):
train(epoch)
acc_test, loss_test, f1, precision, recall = test()
if acc_test > max_acc:
max_acc = acc_test
max_epoch = epoch
max_f1 = f1
max_precision = precision
max_recall = recall
print("Test set results:",
"epoch= {:}".format(max_epoch),
"test_accuracy= {:.4f}".format(max_acc),
"precision= {:.4f}".format(max_precision),
"recall= {:.4f}".format(max_recall),
"f1_score= {:.4f}".format(max_f1)
)
return max_acc, max_precision, max_recall, max_f1
if __name__ == "__main__":
t = time.time()
acc_list =[]
precision_list = []
recall_list = []
f1_list = []
for i, seed in enumerate(args.random_seed):
print('traning {}th model\n'.format(i+1))
acc, precision, recall, f1 = main(seed)
acc_list.append(acc*100)
precision_list.append(precision*100)
recall_list.append(recall*100)
f1_list.append(f1*100)
print('acc: {:.2f} + {:.2f}'.format(np.array(acc_list).mean(), np.std(acc_list)))
print('precision: {:.2f} + {:.2f}'.format(np.array(precision_list).mean(), np.std(precision_list)))
print('recall: {:.2f} + {:.2f}'.format(np.array(recall_list).mean(), np.std(recall_list)))
print('f1: {:.2f} + {:.2f}'.format(np.array(f1_list).mean(), np.std(f1_list)))
print('total time:', time.time() - t)