Graph4NLP

Graph4NLP is an easy-to-use library for R&D at the intersection of Deep Learning on Graphs and Natural Language Processing (i.e., DLG4NLP). It provides both full implementations of state-of-the-art models for data scientists and also flexible interfaces to build customized models for researchers and developers with whole-pipeline support. Built upon highly-optimized runtime libraries including DGL , Graph4NLP has both high running efficiency and great extensibility. The architecture of Graph4NLP is shown in the following figure, where boxes with dashed lines represents the features under development. Graph4NLP consists of four different layers: 1) Data Layer, 2) Module Layer, 3) Model Layer, and 4) Application Layer.

Graph4NLP

Quick tour

Graph4nlp aims to make it incredibly easy to use GNNs in NLP tasks (check out Graph4NLP Documentation). Here is an example of how to use the Graph2seq model (widely used in machine translation, question answering,
semantic parsing, and various other NLP tasks that can be abstracted as graph-to-sequence problem and has shown superior
performance).

We also offer other high-level model APIs such as graph-to-tree models. If you are interested in DLG4NLP related research problems, you are very welcome to use our library and refer to our graph4nlp survey.

from graph4nlp.pytorch.datasets.jobs import JobsDataset
from graph4nlp.pytorch.modules.graph_construction.dependency_graph_construction import DependencyBasedGraphConstruction
from graph4nlp.pytorch.modules.config import get_basic_args
from graph4nlp.pytorch.models.graph2seq import Graph2Seq
from graph4nlp.pytorch.modules.utils.config_utils import update_values, get_yaml_config

# build dataset
jobs_dataset = JobsDataset(root_dir='graph4nlp/pytorch/test/dataset/jobs',
                           topology_builder=DependencyBasedGraphConstruction,
                           topology_subdir='DependencyGraph')  # You should run stanfordcorenlp at background
vocab_model = jobs_dataset.vocab_model

# build model
user_args = get_yaml_config("examples/pytorch/semantic_parsing/graph2seq/config/dependency_gcn_bi_sep_demo.yaml")
args = get_basic_args(graph_construction_name="node_emb", graph_embedding_name="gat", decoder_name="stdrnn")
update_values(to_args=args, from_args_list=[user_args])
graph2seq = Graph2Seq.from_args(args, vocab_model)

# calculation
batch_data = JobsDataset.collate_fn(jobs_dataset.train[0:12])

scores = graph2seq(batch_data["graph_data"], batch_data["tgt_seq"])  # [Batch_size, seq_len, Vocab_size]

Overview

Our Graph4NLP computing flow is shown as below.
graph4nlp_flow

Graph4NLP Models and Applications

Graph4NLP models

  • Graph2Seq: a general end-to-end neural encoder-decoder model that maps an input graph to a sequence of tokens.
  • Graph2Tree: a general end-to-end neural encoder-decoder model that maps an input graph to a tree structure.

Graph4NLP applications

We provide a comprehensive collection of NLP applications, together with detailed examples as follows:

  • Text classification: to give the sentence or document an appropriate label.
  • Semantic parsing: to translate natural language into a machine-interpretable formal meaning representation.
  • Neural machine translation: to translate a sentence in a source language to a different target language.
  • summarization: to generate a shorter version of input texts which could preserve major meaning.
  • KG completion: to predict missing relations between two existing entities in konwledge graphs.
  • Math word problem solving: to automatically solve mathematical exercises that provide background information about a problem in easy-to-understand language.
  • Name entity recognition: to tag entities in input texts with their corresponding type.
  • Question generation: to generate an valid and fluent question based on the given passage and target answer (optional).

Performance

Task Dataset GNN Model Graph construction Evaluation Performance
Text classification TRECT
CAirline
CNSST
GAT Dependency Accuracy 0.948
0.769
0.538
Semantic Parsing JOBS SAGE Constituency Execution accuracy 0.936
Question generation SQuAD GGNN Dependency BLEU-4 0.15175
Machine translation IWSLT14 GCN Dynamic BLEU-4 0.3212
Summarization CNN(30k) GCN Dependency ROUGE-1 26.4
Knowledge graph completion Kinship GCN Dependency MRR 82.4
Math word problem MAWPS
MATHQA
SAGE Dynamic Solution accuracy
Exact match
76.4
61.07

Installation

Currently, users can install Graph4NLP via pip or source code. Graph4NLP supports the following OSes:

  • Linux-based systems (tested on Ubuntu 18.04 and later)
  • macOS (only CPU version)
  • Windows 10 (only support pytorch >= 1.8)

Installation via pip (binaries)

We provide pip wheels for all major OS/PyTorch/CUDA combinations. Note that we highly recommend Windows users refer to Installation via source code due to compatibility.

Ensure that at least PyTorch (>=1.6.0) is installed:

Note that >=1.6.0 is ok.

$ python -c "import torch; print(torch.__version__)"
>>> 1.6.0

Find the CUDA version PyTorch was installed with (for GPU users):

$ python -c "import torch; print(torch.version.cuda)"
>>> 10.2

Install the relevant dependencies:

torchtext is needed since Graph4NLP relies on it to implement embeddings.
Please pay attention to the PyTorch requirements before installing torchtext with the following script! For detailed version matching please refer here.

pip install torchtext # >=0.7.0

Install Graph4NLP

pip install graph4nlp${CUDA}

where ${CUDA} should be replaced by the specific CUDA version (none (CPU version), "-cu92", "-cu101", "-cu102", "-cu110"). The following table shows the concrete command lines. For CUDA 11.1 users, please refer to Installation via source code.

Platform Command
CPU pip install graph4nlp
CUDA 9.2 pip install graph4nlp-cu92
CUDA 10.1 pip install graph4nlp-cu101
CUDA 10.2 pip install graph4nlp-cu102
CUDA 11.0 pip install graph4nlp-cu110

Installation via source code

Ensure that at least PyTorch (>=1.6.0) is installed:

Note that >=1.6.0 is ok.

$ python -c "import torch; print(torch.__version__)"
>>> 1.6.0

Find the CUDA version PyTorch was installed with (for GPU users):

$ python -c "import torch; print(torch.version.cuda)"
>>> 10.2

Install the relevant dependencies:

torchtext is needed since Graph4NLP relies on it to implement embeddings.
Please pay attention to the PyTorch requirements before installing torchtext with the following script! For detailed version matching please refer here.

pip install torchtext # >=0.7.0

Download the source code of Graph4NLP from Github:

git clone https://github.com/graph4ai/graph4nlp.git
cd graph4nlp

Configure the CUDA version

Then run ./configure (or ./configure.bat if you are using Windows 10) to config your installation. The configuration program will ask you to specify your CUDA version. If you do not have a GPU, please type 'cpu'.

./configure

Install the relevant packages:

Finally, install the package:

python setup.py install

Major Releases

Releases Date Features
v0.4.1 2021-06-05 - Support the whole pipeline of Graph4NLP
- GraphData and Dataset support

GitHub

https://github.com/graph4ai/graph4nlp