[**中文**](./README.md) | [**English**](./README_en.md)
# UniMC
Code for  [Zero-Shot Learners for Natural Language Understanding via a Unified Multiple Choice Perspective](https://arxiv.org/abs/2210.08590)



![](./unimc.jpg)

## Update
- [2022-10-18] Release preprint in arXiv.
- [2022-10-14] Release code in GitHub.

## Requirements


```shell
git clone https://github.com/IDEA-CCNL/Fengshenbang-LM.git
cd Fengshenbang-LM
pip install --editable .
```

## Quick Start
You can refer to our [example.py]()

```python
import argparse
from fengshen.pipelines.multiplechoice import UniMCPipelines

total_parser = argparse.ArgumentParser("TASK NAME")
total_parser = UniMCPipelines.piplines_args(total_parser)
args = total_parser.parse_args()
    
pretrained_model_path = 'IDEA-CCNL/Erlangshen-UniMC-Albert-235M-English'
args.language='english'
args.learning_rate=2e-5
args.max_length=512
args.max_epochs=3
args.batchsize=8
args.default_root_dir='./'
model = UniMCPipelines(args, model_path=pretrained_model_path)

train_data = [] 
dev_data = [] 
test_data = [{
	"texta": "it 's just incredibly dull .",
	"textb": "",
	"question": "What is sentiment of follow review?",
	"choice": ["it's great", "it's terrible"],
	"answer": "",
	"label": 0,
	"id": 19
}]

if args.train:
	model.train(train_data, dev_data)
result = model.predict(test_data)
```
## Pretrained Model
For the English model, the model was pre-trained with 14 multiplechoice datasets. For the Chinese model, we have collected 48 datasets to pre-train the model, and we have open sourced the pre-trained model to the HuggingFace community.

| Model | URL   |
|:---------:|:--------------:|
| Erlangshen-UniMC-Albert-235-English  | [https://huggingface.co/IDEA-CCNL/Erlangshen-UniMC-Albert-235M-English](https://huggingface.co/IDEA-CCNL/Erlangshen-UniMC-Albert-235M-English)   |
| Erlangshen-UniMC-RoBERTa-110M-Chinese  | [https://huggingface.co/IDEA-CCNL/Erlangshen-UniMC-RoBERTa-110M-Chinese](https://huggingface.co/IDEA-CCNL/Erlangshen-UniMC-RoBERTa-110M-Chinese)       |
| Erlangshen-UniMC-RoBERTa-330M-Chinese  | [https://huggingface.co/IDEA-CCNL/Erlangshen-UnimC-RoBERTa-330M-Chinese](https://huggingface.co/IDEA-CCNL/Erlangshen-UniMC-RoBERTa-330M-Chinese)   |
| Erlangshen-UniMC-MegatronBERT-1.3B-Chinese  | [https://huggingface.co/IDEA-CCNL/Erlangshen-UniMC-MegatronBERT-1.3B-Chinese](https://huggingface.co/IDEA-CCNL/Erlangshen-UniMC-MegatronBERT-1.3B-Chinese)       |


## Experiments
To evaluate the performance of UniMC, we use 14 multiple-choice datasets to pre-train the model with the ability to make choices

**Zero-shot**
| Model   | T0 11B | GLaM 60B | FLAN 137B | PaLM 540B | UniMC 235M |
|---------|--------|----------|-----------|-----------|------------|
| ANLI R1 | 43.6   | 40.9     | 47.7      | 48.4      | **52.0**         |
| ANLI R2 | 38.7   | 38.2     | 43.9      | 44.2      | **44.4**       |
| ANLI R3 | 41.3   | 40.9     | 47.0        | 45.7      | **47.8**       |
| CB      | 70.1   | 33.9     | 64.1      | 51.8      | **75.7**       |

## Citation
If this repository helps you, please cite this paper:

```text
@article{unimc,
  author    = {Ping Yang and
               Junjie Wang and
               Ruyi Gan and
               Xinyu Zhu and
               Lin Zhang and
               Ziwei Wu and
               Xinyu Gao and
               Jiaxing Zhang and
               Tetsuya Sakai},
  title     = {Zero-Shot Learners for Natural Language Understanding via a Unified Multiple Choice Perspective},
  journal   = {CoRR},
  volume    = {abs/2210.08590},
  year      = {2022}
}
```

## License

[Apache License 2.0](https://github.com/IDEA-CCNL/Fengshenbang-LM/blob/main/LICENSE)