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| import torch | |
| from keybert import KeyBERT | |
| from keyphrase_vectorizers import KeyphraseCountVectorizer | |
| from transformers import T5ForConditionalGeneration,T5Tokenizer | |
| import nltk | |
| from nltk.tokenize import sent_tokenize | |
| nltk.download('stopwords') | |
| nltk.download('punkt') | |
| import streamlit as st | |
| device = torch.device("cuda" if torch.cuda.is_available() else "cpu") | |
| # Load KeyBert Model | |
| kw_extractor = KeyBERT('valurank/MiniLM-L6-Keyword-Extraction', use_auth_token=st.secrets["hf-auth-token"]) | |
| # Load T5 for Paraphrasing | |
| t5_model = T5ForConditionalGeneration.from_pretrained('valurank/t5-paraphraser', use_auth_token=st.secrets["hf-auth-token"]) | |
| t5_tokenizer = T5Tokenizer.from_pretrained('t5-base') | |
| t5_model = t5_model.to(device) | |
| def get_keybert_results_with_vectorizer(text, number_of_results=20): | |
| keywords = kw_extractor.extract_keywords(text, vectorizer=KeyphraseCountVectorizer(), stop_words=None, top_n=number_of_results) | |
| return keywords | |
| def t5_paraphraser(text, number_of_results=10): | |
| text = "paraphrase: " + text + " </s>" | |
| max_len = 2048 | |
| encoding = t5_tokenizer.encode_plus(text, pad_to_max_length=True, return_tensors="pt") | |
| input_ids, attention_masks = encoding["input_ids"].to(device), encoding["attention_mask"].to(device) | |
| beam_outputs = t5_model.generate( | |
| input_ids=input_ids, attention_mask=attention_masks, | |
| do_sample=True, | |
| max_length=2048, | |
| top_k=50, | |
| top_p=0.95, | |
| early_stopping=True, | |
| num_return_sequences=number_of_results | |
| ) | |
| final_outputs =[] | |
| for beam_output in beam_outputs: | |
| sent = t5_tokenizer.decode(beam_output, skip_special_tokens=True, clean_up_tokenization_spaces=True) | |
| final_outputs.append(sent) | |
| return final_outputs | |
| #### Extract Sentences with Keywords -> Paraphrase multiple versions -> Extract Keywords again | |
| def extract_paraphrased_sentences(article): | |
| original_keywords = [i[0] for i in get_keybert_results_with_vectorizer(article)] | |
| article_sentences = sent_tokenize(article) | |
| target_sentences = [sent for sent in article_sentences if any(kw[0] in sent for kw in original_keywords)] | |
| start1 = time.time() | |
| t5_paraphrasing_keywords = [] | |
| for sent in target_sentences: | |
| ### T5 | |
| t5_paraphrased = t5_paraphraser(sent) | |
| t5_keywords = [get_keybert_results_with_vectorizer(i) for i in t5_paraphrased] | |
| t5_keywords = [word[0] for s in t5_keywords for word in s] | |
| t5_paraphrasing_keywords.extend(t5_keywords) | |
| print(f'T5 Approach2 PARAPHRASING RUNTIME: {time.time()-start1}\n') | |
| print('T5 Keywords Extracted: \n{}\n\n'.format(t5_paraphrasing_keywords)) | |
| print('----------------------------') | |
| print('T5 Unique New Keywords Extracted: \n{}\n\n'.format([i for i in set(t5_paraphrasing_keywords) | |
| if i not in original_keywords])) | |
| return t5_paraphrasing_keywords | |
| doc = st.text_area("Enter a custom document") | |
| if doc: | |
| keywords = extract_paraphrased_sentences(doc) | |
| st.write(keywords) | |