This model can be used for sentence compression (aka extractive sentence summarization).
It predicts for each word, whether the word can be dropped from the sentence without severely affecting its meaning.
The resulting sentences are often ungrammatical, but they still can be useful.
The model is [rubert-tiny2]() fine-tuned on the dataset from the paper
[Sentence compression for Russian: dataset and baselines](https://www.dialog-21.ru/media/5106/kuvshinovat-050.pdf).
Example usage:
```python
import torch
from transformers import AutoModelForTokenClassification, AutoTokenizer
model_name = 'cointegrated/rubert-tiny2-sentence-compression'
model = AutoModelForTokenClassification.from_pretrained(model_name)
tokenizer = AutoTokenizer.from_pretrained(model_name)
def compress(text, threshold=0.5, keep_ratio=None):
""" Compress a sentence by removing the least important words.
Parameters:
threshold: cutoff for predicted probabilities of word removal
keep_ratio: proportion of words to preserve
By default, threshold of 0.5 is used.
"""
with torch.inference_mode():
tok = tokenizer(text, return_tensors='pt').to(model.device)
proba = torch.softmax(model(**tok).logits, -1).cpu().numpy()[0, :, 1]
if keep_ratio is not None:
threshold = sorted(proba)[int(len(proba) * keep_ratio)]
kept_toks = []
keep = False
prev_word_id = None
for word_id, score, token in zip(tok.word_ids(), proba, tok.input_ids[0]):
if word_id is None:
keep = True
elif word_id != prev_word_id:
keep = score < threshold
if keep:
kept_toks.append(token)
prev_word_id = word_id
return tokenizer.decode(kept_toks, skip_special_tokens=True)
text = 'Кроме того, можно взять идею, рожденную из сердца, и выразить ее в рамках одной '\
'из этих структур, без потери искренности идеи и смысла песни.'
print(compress(text))
print(compress(text, threshold=0.3))
print(compress(text, threshold=0.1))
# можно взять идею, рожденную из сердца, и выразить ее в рамках одной из этих структур.
# можно взять идею, рожденную из сердца выразить ее в рамках одной из этих структур.
# можно взять идею рожденную выразить структур.
print(compress(text, keep_ratio=0.5))
# можно взять идею, рожденную из сердца выразить ее в рамках структур.
```