PyTorch impelementations of BERT-based Spelling Error Correction Models.

Overview

BertBasedCorrectionModels

基于BERT的文本纠错模型,使用PyTorch实现

数据准备

  1. http://nlp.ee.ncu.edu.tw/resource/csc.html下载SIGHAN数据集
  2. 解压上述数据集并将文件夹中所有 ''.sgml'' 文件复制至 datasets/csc/ 目录
  3. 复制 ''SIGHAN15_CSC_TestInput.txt'' 和 ''SIGHAN15_CSC_TestTruth.txt'' 至 datasets/csc/ 目录
  4. 下载 https://github.com/wdimmy/Automatic-Corpus-Generation/blob/master/corpus/train.sgml 至 datasets/csc 目录
  5. 请确保以下文件在 datasets/csc 中
    train.sgml
    B1_training.sgml
    C1_training.sgml  
    SIGHAN15_CSC_A2_Training.sgml  
    SIGHAN15_CSC_B2_Training.sgml  
    SIGHAN15_CSC_TestInput.txt
    SIGHAN15_CSC_TestTruth.txt
    

环境准备

  1. 使用已有编码环境或通过 conda create -n python=3.7 创建一个新环境(推荐)
  2. 克隆本项目并进入项目根目录
  3. 安装所需依赖 pip install -r requirements.txt
  4. 如果出现报错 GLIBC 版本过低的问题(GLIBC 的版本更迭容易出事故,不推荐更新),openCC 改为安装较低版本(例如 1.1.0)
  5. 在当前终端将此目录加入环境变量 export PYTHONPATH=.

训练

运行以下命令以训练模型,首次运行会自动处理数据。

python tools/train_csc.py --config_file csc/train_SoftMaskedBert.yml

可选择不同配置文件以训练不同模型,目前支持以下配置文件:

  • train_bert4csc.yml
  • train_macbert4csc.yml
  • train_SoftMaskedBert.yml

如有其他需求,可根据需要自行调整配置文件中的参数。

实验结果

SoftMaskedBert

component sentence level acc p r f
Detection 0.5045 0.8252 0.8416 0.8333
Correction 0.8055 0.9395 0.8748 0.9060

Bert类

char level

MODEL p r f
BERT4CSC 0.9269 0.8651 0.8949
MACBERT4CSC 0.9380 0.8736 0.9047

sentence level

model acc p r f
BERT4CSC 0.7990 0.8482 0.7214 0.7797
MACBERT4CSC 0.8027 0.8525 0.7251 0.7836

推理

方法一,使用inference脚本:

python inference.py --ckpt_fn epoch=0-val_loss=0.03.ckpt --texts "我今天很高心"
# 或给出line by line格式的文本地址
python inference.py --ckpt_fn epoch=0-val_loss=0.03.ckpt --text_file /ml/data/text.txt

其中/ml/data/text.txt文本如下:

我今天很高心
你这个辣鸡模型只能做错别字纠正

方法二,直接调用

texts = ['今天我很高心', '测试', '继续测试']
model.predict(texts)

方法三、导出bert权重,使用transformers或pycorrector调用

  1. 使用convert_to_pure_state_dict.py导出bert权重
  2. 后续步骤参考https://github.com/shibing624/pycorrector/blob/master/pycorrector/macbert/README.md

引用

如果你在研究中使用了本项目,请按如下格式引用:

@article{cai2020pre,
  title={BERT Based Correction Models},
  author={Cai, Heng and Chen, Dian},
  journal={GitHub. Note: https://github.com/gitabtion/BertBasedCorrectionModels},
  year={2020}
}

License

本源代码的授权协议为 Apache License 2.0,可免费用做商业用途。请在产品说明中附加本项目的链接和授权协议。本项目受版权法保护,侵权必究。

更新记录

20210618

  1. 修复数据处理的编码报错问题

20210518

  1. 将BERT4CSC检错任务改为使用FocalLoss
  2. 更新修改后的模型实验结果
  3. 降低数据处理时保留原文的概率

20210517

  1. 对BERT4CSC模型新增检错任务
  2. 新增基于LineByLine文件的inference

References

  1. Spelling Error Correction with Soft-Masked BERT
  2. http://ir.itc.ntnu.edu.tw/lre/sighan8csc.html
  3. https://github.com/wdimmy/Automatic-Corpus-Generation
  4. transformers
  5. https://github.com/sunnyqiny/Confusionset-guided-Pointer-Networks-for-Chinese-Spelling-Check
  6. SoftMaskedBert-PyTorch
  7. Deep-Learning-Project-Template
  8. https://github.com/lonePatient/TorchBlocks
  9. https://github.com/shibing624/pycorrector
Owner
Heng Cai
NLPer
Heng Cai
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