Meta Dialog Platform (MDP)

Meta Dialog Platform: a toolkit platform for NLP Few-Shot Learning tasks of:

• Text Classification
• Sequence Labeling

It also provides the baselines for:

• Track-1 of SMP2020: Few-shot dialog language understanding.
• Benchmark Paper: "FewJoint: A Few-shot Learning Benchmark for Joint Language Understanding"

Updates

• Updates 2021.3.8: Fix wrong default setting for few-shot data generator scripts.
• Updates 2020.9.17: FewJoint benchmark (Dataset for SMP) is available: paper, data, reformatted data (for MetaDialog)

Features

State-of-the-art solutions for Few-shot NLP:

• Support Few-shot Learning for sequence-labeling task with state-of-the-art methods: CDT (Hou et al., 2020).
• Support to use semantic within label name or label description.
• Support various deep pre-trained embedding compatible with huggingface/transformers, such as BERT and Electra.
• Support pair-wise embedding mechanism (Hou et al., 2020, Gao et al., 2019).

Easy-to-start & flexible framework:

• Provide tools for easy training & testing.
• Support various few-shot models with unified and extendable interfaces, such as ProtoNet and TapNet.
• Support easy-to-switch similarity-metrics and logits-scaling methods.
• Provide tools of generating episode-style data for meta-learning.

Citation

Please cite code and data:

@article{hou2020fewjoint,
	title={FewJoint: A Few-shot Learning Benchmark for Joint Language Understanding},
	author={Yutai Hou, Jiafeng Mao, Yongkui Lai, Cheng Chen, Wanxiang Che, Zhigang Chen, Ting Liu},
	journal={arXiv preprint},
	year={2020}
}

Get Started

Environment Requirement

python>=3.6
torch>=1.2.0
transformers>=2.9.0
numpy>=1.17.0
tqdm>=4.31.1
allennlp>=0.8.4
pytorch-nlp

Example for Sequence Labeling

Here, we take the few-shot slot tagging and NER task from (Hou et al., 2020) as quick start examples.

Step1: Prepare pre-trained embedding

• Download the pytorch bert model, or convert tensorflow param by yourself with scripts.
• Set BERT path in the ./scripts/run_1_shot_slot_tagging.sh to your setting:

bert_base_uncased=/your_dir/uncased_L-12_H-768_A-12/
bert_base_uncased_vocab=/your_dir/uncased_L-12_H-768_A-12/vocab.txt

Step2: Prepare data

• Download the compatible few-shot data at here: download

• Set test, train, dev data file path in ./scripts/run_1_shot_slot_tagging.sh to your setting.

For simplicity, your only need to set the root path for data as follow:

base_data_dir=/your_dir/ACL2020data/

Step3: Train and test the main model

• Build a folder to collect running log

mkdir result

• Execute cross-evaluation script with two params: -[gpu id] -[dataset name]

Example for 1-shot slot tagging:

source ./scripts/run_1_shot_slot_tagging.sh 0 snips

Example for 1-shot NER:

source ./scripts/run_1_shot_slot_tagging.sh 0 ner

To run 5-shots experiments, use ./scripts/run_5_shot_slot_tagging.sh

Other detailed functions and options:

You can experiment freely by passing parameters to main.py to choose different model architectures, hyperparameters, etc.

To view detailed options and corresponding descriptions, run commandline:

python main.py --h

We provide scripts for general few-shot classification and sequence labeling task respectively:

• classification
  • run_electra_sc.sh
  • run_bert_sc.sh
• sequence labeling
  • run_electra_sl.sh
  • run_bert_sl.sh

The usage of these scripts are similar to process in Get Started.

Run with FewJoint/SMP data

• Get reformatted FewJoint data at here or construct episode-style data by yourself with our tool.
• Use script ./scripts/run_smp_bert_sc.sh and ./scripts/run_smp_bert_sl.sh to perform few-shot intent detection or few-shot slot filling respectively.
• Notice that:
  1. Change train/dev/test path in the scripts before running.
  2. Find predicted results at trained_model_path within running scripts.

Few-shot Data Construction Tool

We also provide a generation tool for converting normal data into few-shot/meta-episode style. The tool is included at path: scripts/other_tool/meta_dataset_generator.py.

Run following commandline to view detailed interface:

python generate_meta_dataset.py --h

For simplicity, we provide an example script to help generate few-shot data: ./scripts/gen_meta_data.sh.

The following are some key params for you to control the generation process:

• input_dir: raw data path
• output_dir: output data path
• episode_num: the number of episode which you want to generate
• support_shots_lst: to specified the support shot size in each episode, we can specified multiple number to generate at the same time.
• query_shot: to specified the query shot size in each episode
• seed_lst: random seed list to control random generation
• use_fix_support: set the fix support in dev dataset
• dataset_lst: specified the dataset type which our tool can handle, there are some choices: stanford & SLU & TourSG & SMP.

If you want to handle other type of dataset, you can add your code for load raw dataset in meta_dataset_generator/raw_data_loader.py.

few-shot/meta-episode style data example

{
  "domain_name": [
    {  // episode
      "support": {  // support set
        "seq_ins": [["we", "are", "friends", "."], ["how", "are", "you", "?"]],  // input sequence
        "seq_outs": [["O", "O", "O", "O"], ["O", "O", "O", "O"]],  // output sequence in sequence labeling task
        "labels": [["statement"], ["query"]]  // output labels in classification task
      },
      "query": {  // query set
        "seq_ins": [["we", "are", "friends", "."], ["how", "are", "you", "?"]],
        "seq_outs": [["O", "O", "O", "O"], ["O", "O", "O", "O"]],
        "labels": [["statement"], ["query"]]
      }
    },
    ...
  ],
  ...
}

Acknowledgment

The platform is developed by HIT-SCIR. If you have any question and advice for it, please contact us(Yutai Hou - ythou@ir.hit.edu.cn or Yongkui Lai - yklai@ir.hit.edu.cn).

License for code and data

Apache License 2.0