From Random Walks to Transformer for Learning Node Embeddings

• This program provides the implementation of our unsupervised node embedding model SANNE as described in our paper whose central idea is to employ a transformer self-attention network to iteratively aggregate vector representations of nodes in sampled random walks.
• SANNE is also used in an inductive setting to infer embeddings of new/unseen nodes adding to a given graph.

Usage

News

• June 08, 2020: Update Pytorch (1.5.0) implementation. You should change to the log_uniform directory to perform make to build SampledSoftmax, and then add the log_uniform directory to your PYTHONPATH.
• March 25, 2020: The Tensorflow implementation was completed one year ago and now it is out-of-date, caused by the change of Tensorflow from 1.x to 2.x. I will release the Pytorch implementation soon.

Requirements

• Python 3
• Pytorch 1.5 or
• Tensorflow 1.6 and Tensor2Tensor 1.9
• scikit-learn 0.21.3

Training

Examples for the Pytorch implementation:

$ python train_pytorch_SANNE.py --dataset cora --batch_size 64 --num_self_att_layers 2 --num_heads 2 --ff_hidden_size 256 --num_neighbors 4 --walk_length 8 --num_walks 32 --learning_rate 0.005 --model_name CORA_trans_att2_h2_nw32_lr0.005

$ python train_pytorch_SANNE_inductive.py --dataset cora --batch_size 64 --num_self_att_layers 2 --num_heads 2 --ff_hidden_size 256 --num_neighbors 4 --walk_length 8 --num_walks 32 --fold_idx 1 --learning_rate 0.005 --model_name CORA_ind_att2_h2_nw32_fold1_lr0.005

Cite

Please cite the paper whenever SANNE is used to produce published results or incorporated into other software:

@InProceedings{Nguyen2020SANNE,
	author={Dai Quoc Nguyen and Tu Dinh Nguyen and Dinh Phung},
	title={A Self-Attention Network based Node Embedding Model},
	booktitle={Proceedings of the European Conference on Machine Learning and Principles and Practice of Knowledge Discovery in Databases (ECML PKDD)},
	year={2020}
}

License

As a free open-source implementation, SANNE is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. All other warranties including, but not limited to, merchantability and fitness for purpose, whether express, implied, or arising by operation of law, course of dealing, or trade usage are hereby disclaimed. I believe that the programs compute what I claim they compute, but I do not guarantee this. The programs may be poorly and inconsistently documented and may contain undocumented components, features or modifications. I make no guarantee that these programs will be suitable for any application.

SANNE is licensed under the Apache License 2.0.