examples/graph/cgscore_experiments/defense_method/RGCN.py

import torch
import numpy as np
import torch.nn.functional as F
from deeprobust.graph.defense import RGCN
from deeprobust.graph.utils import *
from deeprobust.graph.data import Dataset, PrePtbDataset
import argparse
import os
import csv

parser = argparse.ArgumentParser()
parser.add_argument('--seed', type=int, default=15, help='Random seed.')
parser.add_argument('--dataset', type=str, default='Flickr', choices=['cora', 'cora_ml', 'citeseer', 'polblogs', 'pubmed', 'Flickr'], help='dataset')
parser.add_argument('--ptb_rate', type=float, default=0.25,  help='pertubation rate')
parser.add_argument('--ptb_type', type=str, default='minmax', choices=['clean', 'meta', 'dice', 'minmax', 'pgd', 'random'], help='attack type')
parser.add_argument('--hidden', type=int, default=16, help='Number of hidden units.')
parser.add_argument('--dropout', type=float, default=0.5, help='Dropout rate (1 - keep probability).')
parser.add_argument('--gpu', type=int, default=0, help='GPU device ID (default: 0)')


args = parser.parse_args()
args.cuda = torch.cuda.is_available()
print('cuda: %s' % args.cuda)
device = torch.device(f"cuda:{args.gpu}" if torch.cuda.is_available() else "cpu")

# make sure you use the same data splits as you generated attacks
np.random.seed(args.seed)
if args.cuda:
    torch.cuda.manual_seed(args.seed)

# Here the random seed is to split the train/val/test data,
# we need to set the random seed to be the same as that when you generate the perturbed graph
# data = Dataset(root='/tmp/', name=args.dataset, setting='nettack', seed=15)
# Or we can just use setting='prognn' to get the splits

# data = Dataset(root='/tmp/', name=args.dataset, setting='prognn')
data = Dataset(root='/tmp/', name=args.dataset)
adj, features, labels = data.adj, data.features, data.labels
idx_train, idx_val, idx_test = data.idx_train, data.idx_val, data.idx_test

# adj, features, labels = preprocess(adj, features, labels, preprocess_adj=False)


## load from attacked_adj
ptb_path = f"../attacked_adj/{args.dataset}/{args.ptb_type}_{args.dataset}_{args.ptb_rate}.pt"
perturbed_adj = torch.load(ptb_path)
perturbed_adj = perturbed_adj

def test_rgcn(adj):
    ''' test on GCN '''

    # adj = normalize_adj_tensor(adj)
    gcn = RGCN(nnodes=adj.shape[0], nfeat=features.shape[1], nclass=labels.max()+1,
               nhid=args.hidden, device=device)
    gcn = gcn.to(device)
    gcn.fit(features, adj, labels, idx_train, idx_val, train_iters=200, verbose=True)
    gcn.eval()
    acc = gcn.test(idx_test)
    return acc


def main():
    
    acc = test_rgcn(perturbed_adj)
    
    csv_dir = "../result"
    os.makedirs(csv_dir, exist_ok=True) 

    csv_filename = os.path.join(csv_dir, f"RGCN_{args.dataset}_{args.ptb_type}_{args.ptb_rate}.csv")
    row = [f"{args.dataset} ", f" {args.ptb_type} ", f" {args.ptb_rate} ", f" {acc}"]

    try:
        file_exists = os.path.isfile(csv_filename)
        with open(csv_filename, 'a', newline='') as csvfile:
            writer = csv.writer(csvfile)
            if not file_exists:
                writer.writerow(["dataset ", "ptb_type ", "ptb_rate ", "accuracy"])
            writer.writerow(row)
    except Exception as e:
        print(f"[Error] Failed to write CSV: {e}")
    # # if you want to save the modified adj/features, uncomment the code below
    # model.save_adj(root='./', name=f'mod_adj')
    # model.save_features(root='./', name='mod_features')

if __name__ == '__main__':
    main()