Abstractive Summarization
Collection
Fine-tune the NorGLMs on NO-CNN/DailyMail dataset.
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6 items
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Updated
NorGPT-3B-summarization-peft is trained on top of NorGPT-3B model using RLHF strategy on NO-CNN-DailyMail dataset.
Different from step 2 in the original RLHF, we trained the reward model by estimating the semantic similarity between the candidate generated text and the human annotated summary (golden summary) using the NorBERT model. Generated summaries with higher cosine similarity to the golden summary will be ranked higher in the training of the reward model.
Prompt format:
Summarise the article:\\n{article} |||\\n{positive_sample}
Inference prompt:
Summarise the article:\\n{article} |||\\n
We split data to train on step 1-step 3 for RLHF:
#samples | |
---|---|
step 1 | 61181 |
step 2 | 16798 |
step 3 | 9758 |
from transformers import AutoModelForCausalLM, AutoTokenizer
import torch
model_id = "NorGLM/NorGPT-3B-rfhl-summarization"
tokenizer = AutoTokenizer.from_pretrained(model_id)
tokenizer.pad_token = tokenizer.eos_token
model = AutoModelForCausalLM.from_pretrained(
model_id,
device_map='auto',
torch_dtype=torch.bfloat16
)
Load the model to evaluate on the test set of NO-CNN-DailyMail dataset:
def generate_texts(model, tokenizer, prompts, max_seq_length=200, do_sample=True, top_p=0.95, top_k=10):
# prompts are a list of news articles
results = []
cnt = 0
for prompt in prompts:
cnt += 1
pro_len = len(prompt.split())
if pro_len>1024:
results.append('')
continue
prompt = 'Summarise the article:\\n' + prompt + ' |||\\n'
model_inputs = tokenizer(prompt, return_tensors='pt').to(torch_device)
output = model.generate(**model_inputs, do_sample=False, max_new_tokens=max_seq_length)
result = tokenizer.decode(output[0], skip_special_tokens=True)
result = result.split("|||\\n")[-1]
results.append(result)
return results
print("--LOADING EVAL DATAS---")
eval_data = load_dataset("NorGLM/NO-CNN-DailyMail", data_files="test.csv")
prompts = eval_data['train']['article']
positive_samples = eval_data['train']['positive_sample']
print("--MAKING PREDICTIONS---")
model.eval()
output_file = <output file name>
with torch.no_grad():
results = generate_texts(model, tokenizer, prompts)
df = pd.DataFrame({'article':prompts, 'generated_text':results, 'positive_sample':positive_samples})
print("Save results to csv file...")
df.to_csv(output_file)
More training details will be released soon!