README.md

metadata

language: zh
datasets: CLUECorpusSmall
widget:
  - text: 米饭是一种用稻米与水煮成的食物

Chinese GPT2-medium Model

Model description

The model is used to generate Chinese texts. You can download the model either from the GPT2-Chinese Github page, or via HuggingFace from the link gpt2-medium-chinese-cluecorpussmall.

How to use

You can use the model directly with a pipeline for text generation:

>>> from transformers import BertTokenizer, GPT2LMHeadModel, TextGenerationPipeline
>>> tokenizer = BertTokenizer.from_pretrained("uer/gpt2-medium-chinese-cluecorpussmall")
>>> model = GPT2LMHeadModel.from_pretrained("uer/gpt2-medium-chinese-cluecorpussmall")
>>> text_generator = TextGenerationPipeline(model, tokenizer)   
>>> text_generator("这是很久之前的事情了", max_length=100, do_sample=True)
    [{'generated_text': '这是很久之前的事情了 。 我 现 在 想 起 来 就 让 自 己 很 伤 心 ， 很 失 望 。 我 现 在 想 到 ， 我 觉 得 大 多 数 人 的 生 活 比 我 的 生 命 还 要 重 要 ， 对 一 些 事 情 的 看 法 ， 对 一 些 人 的 看 法 ， 都 是 在 发 泄 。 但 是 ， 我 们 的 生 活 是 需 要 一 个 信 用 体 系 的 。 我 不 知'}]

Training data

CLUECorpusSmall is used as training data.

Training procedure

The model is pre-trained by UER-py on Tencent Cloud. We pre-train 1,000,000 steps with a sequence length of 128 and then pre-train 250,000 additional steps with a sequence length of 1024.

Stage1:

python3 preprocess.py --corpus_path corpora/cluecorpussmall.txt \
                      --vocab_path models/google_zh_vocab.txt \
                      --dataset_path cluecorpussmall_lm_seq128_dataset.pt \
                      --seq_length 128 --processes_num 32 --data_processor lm 

deepspeed pretrain.py --deepspeed --deepspeed_config models/deepspeed_config.json \
                      --dataset_path corpora/cluecorpussmall_lm_seq128_dataset.pt \
                      --vocab_path models/google_zh_vocab.txt \
                      --config_path models/gpt2/medium_config.json \
                      --output_model_path models/cluecorpussmall_gpt2_medium_seq128.bin \
                      --world_size 8 --batch_size 64 \
                      --total_steps 1000000 --save_checkpoint_steps 100000 --report_steps 50000

Stage2:

python3 preprocess.py --corpus_path corpora/cluecorpussmall.txt \
                      --vocab_path models/google_zh_vocab.txt \
                      --dataset_path cluecorpussmall_lm_seq1024_dataset.pt \
                      --seq_length 1024 --processes_num 32 --data_processor lm 

deepspeed pretrain.py --deepspeed --deepspeed_config models/deepspeed_config.json \
                      --dataset_path corpora/cluecorpussmall_lm_seq1024_dataset.pt \
                      --vocab_path models/google_zh_vocab.txt \
                      --config_path models/gpt2/medium_config.json \
                      --pretrained_model_path models/cluecorpussmall_gpt2_medium_seq128_pt.bin \
                      --output_model_path models/cluecorpussmall_gpt2_medium_seq1024_stage2 \
                      --world_size 8 --batch_size 16 --learning_rate 5e-5 \
                      --total_steps 250000 --save_checkpoint_steps 50000 --report_steps 10000 \
                      --deepspeed_checkpoint_activations --deepspeed_checkpoint_layers_num 12

Finally, we convert the pre-trained model into Huggingface's format:

python3 models/cluecorpussmall_gpt2_medium_seq1024_stage2/zero_to_fp32.py models/cluecorpussmall_gpt2_medium_seq1024_stage2 cluecorpussmall_gpt2_medium_seq1024_model.bin
python3 scripts/convert_gpt2_from_uer_to_huggingface.py --input_model_path cluecorpussmall_gpt2_medium_seq1024_model.bin \
                                                        --output_model_path pytorch_model.bin \
                                                        --layers_num 24

BibTeX entry and citation info

@article{radford2019language,
  title={Language Models are Unsupervised Multitask Learners},
  author={Radford, Alec and Wu, Jeff and Child, Rewon and Luan, David and Amodei, Dario and Sutskever, Ilya},
  year={2019}
}

@article{zhao2019uer,
  title={UER: An Open-Source Toolkit for Pre-training Models},
  author={Zhao, Zhe and Chen, Hui and Zhang, Jinbin and Zhao, Xin and Liu, Tao and Lu, Wei and Chen, Xi and Deng, Haotang and Ju, Qi and Du, Xiaoyong},
  journal={EMNLP-IJCNLP 2019},
  pages={241},
  year={2019}
}